Kouki Amanogawa

	WARNING! This article contains information from the web novel. Do not proceed unless you want to be spoiled.

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Kouki Amanogawa
Japanese	天（あま）之（の）河（がわ）光（こう）輝（き）
Romaji	Amanogawa Kōki
Primary Information
Aliases	God's Apostle Hero Ranger Red Masochist Hero (Hajime Nagumo)
Origin World	Earth (Japan)
Status	Alive
Physical Information
Race	Human (formerly) Human-Demi-Apostle Hybrid
Gender	Male
Age	17 (debut)
Height	180 cm
Hair Color	Brown
Eye Color	Jade Green (WN) Blue (Anime)
Mana Color	Pure White Golden (Anime)
Professional & Social Info
Occupation	Student (Japan) Adventurer
Job	Hero
Affiliations	Hero Party (leader) Heiligh Kingdom Returners
Relatives	Kanji Amanogawa (Paternal Grandfather) † Unnamed Paternal Grandmother † Seiji Amanogawa (Father) Miya Amanogawa (Mother) Mitsuki Amanogawa (Younger Sister)
Relations	Moana de Shelt Synclea (Lover) Aularodde Lea Refeat (Lover)
Debut
Web Novel	Chapter 1
Light Novel	Volume 1
Manga	Chapter 0
Anime	Episode 1 (flashback)
Portrayal
Japanese Voice	Tetsuya Kakihara
EnglishVoice	Ricco Fajardo

Kouki Amanogawa (天（あま）之（の）河（がわ）光（こう）輝（き）, Amanogawa Kōki^?) is a major character from the Arifureta: From Commonplace to World's Strongest series.

He is one of the students from Japan who got involved in the summoning incident and ended up in Tortus along with his other classmates. He is somewhat like the whole class's leader, as most students look up to him. This is further enforced by him being bestowed with the rare job as the Hero.

Appearance

Kouki is a typical ikemen (good-looking man), with good looks, athletics, smarts, and a good personality. He has silky brown hair and gentle eyes. His body is toned and slender at about 180 centimeters.

He wears divine armor, a white cape that is blue on the inside, a white long-sleeved tunic, pants, and gloves, all of which are adorned with gold accents.

In the after story, Kouki wears a standard adventurer's getup along with a hooded cloak.

Personality

“

I’m going to fight. If we save everyone, then we can go home. So just you watch! I’m going to save everyone, including us!

”

— Kouki proclaiming his desire to save Tortus, Light Novel Volume 01

Kouki is charismatic, kind, and driven by a strong sense of justice, often seen as a "perfect" hero due to his handsome appearance. However, his deeply flawed nature—marked by arrogance and delusion—stems from his grandfather’s teachings that equate majority opinion with righteousness. This simplistic worldview, reinforced by untested success on Earth, fosters Kouki's belief in his own infallibility, making him dismissive of others' perspectives and prone to blaming others, particularly Hajime, for his shortcomings. His arrogance manifests in his refusal to heed warnings from friends like Shizuku, instead clinging to a delusional sense of self-righteousness that blinds him to reality.

Summoned to Tortus as a "Hero" by the Holy Church, Kouki's personality degrades as his ego swells under their worship. Misled by Ehit's manipulations, he fails to grasp the brutal realities of war, hypocritically condemning actions like Hajime's killing of the demon Cattleya despite her threat. His jealousy and need to prove superiority lead to reckless challenges against Hajime, resulting in humiliating defeats. Kouki's delusional pride and poor leadership leave him vulnerable to betrayal by Eri and Daisuke, and his hesitation in battle—rooted in his naive view of enemies as redeemable—endangers others. His degradation peaks in the Schnee Labyrinth, where his refusal to acknowledge flaws strengthens his shadow, and his irrational accusations that Hajime brainwashed allies reveal a descent into delusion. Under Eri's brainwashing, Kouki hits rock bottom, betraying friends and siding with Ehit while claiming to save them, his arrogance blinding him to his corruption.

In the After Story, guilt over his actions drives Kouki to drop out of high school and wander Tortus, recklessly hunting monsters to atone and flinching at the "hero" label. Summoned to the Desert World, he grapples with Moana's plight against the "Dark Beings," struggling to reconcile his naive ideals with war's realities. A near-fatal wound and a child's plea to defend Arquette force him to confront mortality and the necessity of killing. Reflecting on his grandfather's flawed ideals, Shizuku's scolding, and Eri's final words, Kouki sheds his delusional pride. His solitary stand saves countless lives, restoring his kindness and resolve. His determination to save Moana earns Hajime's respect, who aids in saving Synclea Kingdom, marking Kouki's redemption as a grounded, selfless protector.

Powers & Abilities

• Physical Abilities
• Magical Abilities
• Combat Styles & Techniques
• Stats
• Skills
• Spells/Attacks
• Weapons & Equipment

• Enhanced Physical Abilities - Being both one of Ehit's summoned warriors, and the Hero on top of it, Kouki gained all around superhuman physical abilities. His stats are among the highest in the Hero party only being surpassed by Shizuku in speed and Ryutarou in strength after he powers up with magic. Despite being the strongest fighter of the Hero party, his abilities has inferiority to Hajime and his companions even with "Limit Break" and fused with his doppelgänger which are still not strong enough to match for Hajime as Kouki's abilities are 12 times weaker than Hajime as he was unable to touch or hit Hajime during his second fight even Ehit now viewed Kouki to be useless for being far too weak. With his failures to acquire "Age of Gods" magic, Kouki is currently stronger than all the classmates but significantly weaker than Hajime and his wives. After becoming an apostle hybrid, Kouki's physical abilities significantly improved.
  • Enhanced Strength - Kouki possesses enhanced strength which is further enhanced by the power of his Holy Sword. Kouki's strength stats are the highest in the Hero Party, only being surpassed by Ryutarou when he enhances himself with body strengthening magic. When he enhances himself with "Overload", he was able overpower and bisect Cattleya's monster army and penetrate her earth shield with ease. However, in his second fight with Hajime even when merged with his doppelganger and used "Limit Break", his strength and power up were still far too weak to match for Hajime's immense strength
  • Enhanced Speed - Kouki possesses enhanced speed, being the second fastest member of the Hero Party, only being surpassed by Shizuku, who is a speed-based fighter. However, he is unable to keep up with Hajime's inhuman speed (that is even greater than Shizuku herself).
  • Enhanced Durability - Kouki has enhanced durability giving him the ability to withstand attacks such as Cattleya and her monsters' attacks with moderate injuries. He was able to withstand Ryutaro's gauntlet enhanced attacks and his metamorphosis magic transformation, as well Shizuku's Black Blade strikes. While he is very durable, his durability cannot withstand Hajime's strength as the latter broke through Kouki's defensive abilities and severely damaged him by sending him flying to an ice wall even when using "Limit Break" and fused with his doppelgänger. Both of his kneecaps and shoulders weren't durable after both of them gotten shot by Hajime's guns.
  • Enhanced Endurance - Kouki has an enhanced degree of endurance which he honed by fighting in the Great Orcus Labyrinth and other Labyrinths. While his second fight with Hajime, Kouki coughed out blood when taking severe damage from him. After he obtained the skill "War Demon," his endurance was further increased as he was capable of fighting several thousand "Dark Beings" for several days without succumbing to his accumulated injuries.
  • Enhanced Senses - Due to his "Sense Presence" and "Sense Magic," Kouki has good situational awareness as the Hero Party relied on him to detect oncoming threats. However his sense skills are inferior to Hajime's who has the same skills and several derivative skills with them which he continuously honed and Shea, who's enhanced hearing allows her to detect threats a moment before Hajime.
• Expert Combatant - Kouki has trained in various forms of combat and the Yaegashi Dojo since a young age. After being summoned to Tortus and receiving further training, Kouki's combat skills have been further honed.
• Master Swordsman - Kouki has trained in Kendo and the Yaegashi Dojo since a young age. After being summoned to Tortus and receiving further training by the likes of Meld Loggins, who was the best swordsman in the Heiligh Kingdom, Kouki's swordsmanship skills have been further honed. By combining his swordsman capabilities with the skills "Serene Mind" and "War Demon", Kouki was able to kill several thousand "Dark Beings". Albeit his limit is 10,000 regardless of which types of enemies come his way and even then he could die way before reaching that number if one of his enemies hit one of his vitals.

• Immense Mana - Being the Hero, Kouki has a higher quantity of mana than most people in Tortus. Among the Hero party, Kouki has the highest mana capacity, with the exception of Kaori, who trained relentlessly and increased her mana capacity. After undergoing the apostle transformation process, Kouki's mana pool grew significantly, which allows him to perform his spells on larger scales and at higher levels than before.
• Magic Master - Thanks to his job as a Hero, Kouki is very skilled in magic, capable of using all elemental magics, specializing in offensive light magic that is enhanced by the power of his Holy Sword. While he lacks the same level of mastery as those who specialize in magic, Kouki has enough skills to uses advanced spells in rapid success.

• Yaegashi-style (八重樫（やえがし）流（りゅう）, Yaegashi-ryū^?) - A style of samurai martial arts has been developed by the Yaegashi Dojo that had been around for generations. Though it's primarily focused on kenjutsu, more suitable for weapons like a katana, it also has iaijutsu techniques, which utilizes the scabbard, and also taijutsu techniques, which employed hand to hand combat. Kouki is very skilled in using this form, but lacks the talent and mastery that his friend Shizuku displays with it.
  • Blade Reversal (音刃流（おとはなが）し, Oto ha Nagashi^?) - A counter-attack that uses a reverse blade grip and angles the blade to deflect the incoming attack. They then finish by slashing upward using the backhanded grip.
    • Flowing Blade Reversal (音刃流（おとはなが）し・逆波（さかなみ）, Oto ha Nagashi Sakanami^?) - A technique that Kouki developed by himself, in which the subject uses their sword to redirect projectiles at the enemy.
  • Mirror Bolt (鏡（きょう）雷（らい）, Kyō Rai^?) - The subject throws the opponent using aikido, then attacks them while they are trapped mid-air.
  • Mist Piercer (霞（かすみ）穿（うが）ち, Kasumi Ugachi^?) - The subject approaches the enemy, while also leaning back to disrupt their sense of perspective, and would attack them in the head with their sword.
    • True Pierce (真穿（しんうが）ち, Shin Ugachi^?) - Similar to "Mist Piercer," but the subject would thrust their sword at the enemy's heart.
  • Mountain Tempest (山（やま）嵐（あらし）, Yamaarashi^?) - The subject starts by slashing diagonally downward, but then switches grips and swings sideways with their sheath instead.
  • Pale Moon (水（すい）月（げつ）, Suigetsu^?) - The subject swings their sword in a arc with one hand, then switches with the other hand to finish the arc and form a circle.
  • Rising Dragon (登（とう）龍（りゅう）, Tōryū^?) - After unleashing a slashing attack, the subject follows up with a jump kick and a finisher with their sheath.
  • Swallow's Gambit (無（む）明（みよう）打（う）ち, Mumiyō-Uchi^?) - The subject distracts their opponent with their sword while attacking with the sheath.
• Heiligh Kingdom Knight Sword Art (王（おう）国（こく）騎（き）士（し）剣術（けんじゅつ）, Ōkokukishi Kenjutsu^?) - Kouki was given special training about how to utilize the sword techniques of the Heiligh Kingdom Knights by Meld Loggins, who was the best swordsman in the Heiligh Kingdom. These techniques are best suited in conjunction with a western sword or a broadsword and involve heavy sweeping attacks and protective stances to shield multiple people.
  • Rotation Blade (旋刃（せんじん）, Senjin^?) - A technique where the sword is swung horizontally with one hand would be handed over to the other hand behind the back and then it would slash horizontally again from exactly the same direction. The slash would reach to all directions like a whirlwind.
  • Fortress Ring (砦輪（さいりん）, Sairin^?) - A protection technique which involves the subject rotating their sword. The rotation instantly produces a roaring gale that looks like a giant round shield if it was seen from the side, which is very effective at defending allies from ranged attacks.

Level	Strength	Vitality	Defense	Agility	Magic	Magic Defense	"as per"
1	100	100	100	100	100	100	LN - Volume 01
10	200	200	200	200	200	200
46	560	560	560	560	560	560	WN - ch019
50	620	620	620	620	620	620	Anime - Episode 03
72	880	880	880	880	880	880	LN - Volume 04
83	1020	1020	1020	1020	1020	1020	WN - ch122

Note :-

• The base stats given above aren't Kouki's current stats, as the last time the author provided stats for him in the Web Novel was before the Haltina's Labyrinth trial.
• Kouki's base stats gets increased based on his usage of skills "Limit Break" which triples his base stats, and "Overload" which quintuples his base stats.

• All Elemental Affinity (全属性適正, Zen Zokusei Tekisei^?) - A skill to use all kinds of magic.
  • Light Element Proficiency (光属性効果上昇, Hikari Zokusei Kōka Jōshō^?) - It increases the effects of light magic being cast.
  • Speed Casting (発動速度上昇, Hatsudō Sokudo Jōshō^?) - It allows the user to cast magic at a faster rate.
• All Elemental Resistance (全属性耐性, Zen Zokusei Taisei^?) - A skill that increases the resistance to all elemental attacks.
  • Increased Light Resistance (光属性効果上昇, Hikari Zokusei Kōka Jōshō^?) - It further increases resistance to light magic.
• Physical Resistance (物理耐性, Butsuri Taisei^?) - It increases the physical resistance and recovery rate of the user. The degree of impact is reduced as well.
  • Improved Healing (治癒力上昇, Chiyu-ryoku Jōshō^?) - It further increases the recovery rate.
  • Impact Absorption (衝撃緩和, Shōgeki Kanwa^?) - It decreases impact effectiveness.
• Spell Melding (複合魔法, Fukugō Mahō^?) - A skill to fuses any type of magic which allows the user to use combined/joint magic.
• Sword Mastery (剣術, Kenjutsu^?) - It increases the user's proficiency in the art of sword-wielding.
  • Serene Mind (有念無想, Yūnenmusō^?) - A skill in which the user would be able to find the most optimum option when in battle and allows them to swing their sword in the state of a complete trance. Because the sword is swung in a state of nothingness, the process of the sword being swung is remarkably difficult to perceive. However, using this skill would make it difficult to think of anything else.
• Herculean Strength (剛力, Gōriki^?) - It increases the physical strength of the user.
• Supersonic Step (縮地, Shukuji^?) - It allows for quick high-speed movement.
  • Explosive Supersonic Step (爆縮地, Bakushuku-chi^?)
• Foresight (先読, Saki Doku^?) - A skill to predict anyone or anything's movement.
• High Speed Mana Recovery (高速魔力回復, Kōsoku Maryoku Kaifuku^?) - It increases the mana recovery rate of the user.
• Sense Presence (気配感知, Kehai Kanchi^?) - It allows the user to gain a better understanding of the surrounding and sense life signs within a 10 meter radius.
• Sense Magic (魔力感知, Maryokukanchi^?) - It allows the user to detect and perceive the flow of mana and activation of hidden or ranged spells and magic.
• Body Strengthening (身体強化, Shintai Kyōka^?) - A skill to use magic to strengthen the body.
  • Increased Concentration (集中強化, Shūchū Kyōka^?) - A skill to concentrate "Body Strengthening" to a fixed point in the body.
• Limit Break (限界突破, Genkai Toppa^?) - A skill to go over one's limits; amplifying their power by three times one's basic stats, but this power comes with a rebound - once used the user will be heavily fatigued. Using it for long periods of time will damage the user's body.
  • Overload (覇潰, Hatsui^?) - A skill greater than "Limit Break" - it multiplies the abilities of the user by fives times with more damage recoil to the user than the normal "Limit Break".
  • War Demon (戦鬼, Senki^?) - A derivative skill of "Limit Break" which reinforces the user's body using their mana, regardless of how injured they are. As a result, the user can continue fighting for a extended period with numerous injuries, without rest.
• Restoration Magic (再生魔法, Saisei Mahō^?) - One of the ancient magics originating from the "Age of Gods," which allows the user to restore the state of anything to either its previous or original condition. The true power of this magic is the ability to interfere with the time, meaning it has the ability to manipulate the time of anything, anyplace or anyone to a point the user desires to. It could also be used to look into the past, or potential futures based on set decision variables.
• Language Comprehension (言語理解, Gengo Rikai^?) - A base skill granted to all those who got summoned. It gives the user the ability to understand any language and be proficient in it.

Light Magic

• Light Sphere (光球, Kōkyū^?) - A beginner-rank spell that creates a ball of light.
• Heavenrend (天翔裂破, Tenshō Retsupa^?) - A spell that accelerates the caster's attack speed and unleashes countless crescent-moon-shaped blades of light. "Light that tears through all creation, Wind that erodes time itself, rage like a thousand flower petals and coalesce into a blinding storm— Heavenrend!"
• Holy Blade (光刃, Kōjin^?) - It coats the Holy Sword with light around two meters in length transforming the Holy Sword into a greatsword to increase the cutting power of the blade. "My will is a blade! Light, heed my call and sunder my foes!— Holy Blade!"
• Divine Deluge (天落流雨, Tenrakuryūu^?) - It targets multiple enemies and attacks them from above.
• Heavensturm (天爪流雨, Tensōryūu^?) - A relatively weak spell that covers a large area. It unleashes a single stream of light over a large area. It is also able to blind the targets.
  • Heavensturm - Shatter (天爪流雨・震, Tensōryūu Shin^?)- A upgraded version of Heavenstrum that Kouki can use due to Hajime upgrading his Holy Sword. It has increased power and unleashes shockwaves along with the stream of light.
• Divine Armor (光鎧, Kōgai^?) - It covers the caster in a protective veil of light. "Provide a bulwark— Divine Armor!"
• Astral Unleash (天翔剣四翼, Tenshōken Shiyoku^?) - It draws a curve in the air, and four slashes of light appear from the space.
• Dazzling Eruption (光爆, Kōbaku^?) - It gathers a vast amount of mana at the tip of the Holy Sword and unleashes an explosion when the enemy is cut.
• Celestial Flash (天翔閃, Tenshōsen^?) - An advance-rank light spell that unleashes a blade of light to destroy the enemy. It is so powerful that it can shatter through barriers of similar rank. "Soar unto heaven, O divine wings— Celestial Flash!"
  • Celestial Flash - Shatter (天翔閃・震, Tenshōsen Shin^?) - An upgraded version of Kouki's Celestial Flash that Kouki can use due to Hajime upgrading the power of his Holy Sword. It is twice as large and powerful than his standard Celestial Flash and unleashes a blade of light that is accompanied by a tornado of shockwaves.
  • Celestial Flash - Eightfold Wings (天翔閃・八翼, Tenshōsen Yaeyoku^?) - It unleashes a barrage of light slashes from the Holy Sword.
  • Celestial Flash - Hundred Wings (天翔閃・百翼, Tenshōsen Hyakuyoku^?) - It unleashes a hundred light slashes from the Holy Sword.
  • Celestial Flash - Storm (天翔閃・嵐, Tenshōsen Arashi^?) - A new version of Celestial Flash that Kouki can use due to Hajime upgrading his Holy Sword. It releases a Celestial Flash along with a storm of invisible wind blades. Thanks to Kouki's high mana pool, he can unleash wind blades in the double digits.
• Divine Wrath (神（かむ）威（い）, Kamui^?) - The most powerful offensive light magic in existence that exemplified God's wrath and most powerful offensive spell in the world. It unleashes a bombardment of annihilating light to destroy the user's enemies. However, despite its immense power, it has a long chant which makes it difficult to use in battle. This spell is Kouki's trump card. "O Holy spirit! Bring ruin to all that is evil with thine divine light! By the breath of God, may these clouds of darkness be swept clear, and the world bathed in sanctity! By the mercy of God, may this strike redeem the sins of man! — Divine Wrath!"
  • Divine Wrath - Tenfold (神威・十連, Kamui Jūren^?) - It unleashed multiple "Divine Wrath" spells simultaneously.
  • Divine Wrath of a Thousand Forms - Dragon Form (神威・千変万化・光竜形態, Kamui Senpenbanka Kōryū Keitai^?) - A spell that Kouki could use only after being subjected to Ehit's apostleification, while also being supplemented with an unlimited supply of mana. It transforms the normal Divine Wrath into a large white dragon that can remain permanently active. It can shoot out beams of light from its mouth like a dragon's breath. Furthermore, each of its claws is actually a "Celestial Flash" unto itself. 千変万化
  • Divine Wrath of a Thousand Forms - Advent of the Dragon Horde (神威・千変万化――創生・光竜軍, Kamui Sebenbanka Sōsei Kōryū-Gun^?) - Another spell Kouki gained upon being empowered by Ehit. It summons a horde of 50 dragons that are at least 1 meter-long.

Recovery Magic

• Divine Veil (周天, Shūten^?) ― An intermediate-rank healing spell. The amount of healing it provide was minimal, but so long as the spell is active, it continues to passively restore the target's health while enveloping them in the caster’s mana. "Celestial ladder illuminating the land unceasingly. That is the light of protection and healing."
• Renewal (万天, Manten^?) - An intermediate-rank healing spell that dispels status debuffs from the target. "Heaven’s providence, grant succor to the doomed— Renewal!"
• Aetherflow (聖典, Seiten^?) - The highest-ranked recovery magic spell. A super wide-ranged spell with effect of healing everyone inside its area. The range itself depends on the amount of the caster's mana and proficiency, but at its worst, its effective range is 500 meters in radius. Moreover, if the caster gives the "sign" beforehand, it will be able to heal a specific target. Normally this magic is used with tens of magicians, and takes a lot of time to chant along with its gigantic magic array. To be able to activate it in only one, two minutes alone is impossible unless one is a cheat-like character. "Divine Mother, smiling down from heaven, encompass all in thy heavenly embrace— Aetherflow!"

Barrier Magic

• Holy Shield (光絶, Kōzetsu^?) - A beginner-rank defense magic spell that summons a barrier of light. "Guardian of light, lend us thy aid— Holy Shield!"
• Sacred Shields (天絶, Tenzetsu^?) - An intermediate-rank spell that allows the caster to deploy multiple "Holy Shields" at once that can defend, or to push back and restrain enemies. The shields can also be moved according to the caster's will. "Undying holy light, be my shield forevermore— Sacred Shields!"
• Hallowed Ground (聖絶, Seizetsu^?) - The strongest barrier magic spell. It creates an impenetrable barrier that can't be broken by normal means, but does have some limitations. It separates a particular area from other areas and not people from people, so enemies within the AOE would not be pushed away. It also consumes a lot of mana and can only be used for a minute. "Reject all malice and let this be a holy ground that denies thine enemies passage— Hallowed Ground!"

Wind Magic

• Wind Wall (風壁, Fūheki^?) - It creates a wall of wind that can be used to blow objects away.
• Force Lasher (砲皇, Hōkō^?) - An intermediate-rank spell that unleashes spiraling whirlwinds created from the force of a vacuum that can shoot out horizontally.
• Blitz Hammer (風槌, Fūtsuchi^?) - It blows away the target with a gale of wind.
• Breeze Breath (風音, Kazene^?) - A support-oriented wind spell that allows the caster to amplify sounds using the power of wind, or to carry specific noises over long distances.
• Wind Blast (風爆, Fūbaku^?) - An advance-rank spell that can create a sphere with the size of 1 to 2 meters in diameter which contains numerous vacuum wind blades that will attack the target. "Heed my call, O wind— Wind Blast!"

Lightning Magic

• Lightning Spear (雷槍, Raisō^?) - It unleashes a spear of lightning.
  • Lightning Spear - Sevenfold (雷槍・七連, Raisō Nana-Ren^?) - It unleashes seven spears of lightning.

Ancient Magic Spells

• Tetragrammaton (絶象, Zesshō^?) - Restoration magic variant, a magic which restores everything regardless of whether it is organic or inorganic matter. It can even restore someone on the brink of death.

Original Composite Spells

• Divine Wrath - Ten Celestial Flashes (神威・十天翔閃, Kamui Jū Tenshōsen^?) - A composite spell that combines "Celestial Flash" with "Divine Wrath." It creates ten Celestial Flashes with the power of the strongest light spell in existence, "Divine Wrath". Additionally, the Celestial Flashes are accompanied with a great number of light blades, like the improvised version of Celestial Flash, "Celestial Flash - Storm".
• Divine Wrath - Force Lasher (神威・砲皇, Kamui Hōkō^?) - A composite spell that combines "Divine Wrath" and the wind spell "Force Lasher." It summons a tornado made of light and shoots it out horizontally.
• Divine Wrath - Holy Blade (神威・光刃, Kamui Kōjin^?) - A composite spell that combines "Holy Blade" with "Divine Wrath" It creates an extended blade from the Holy Sword that contains the power of Divine Wrath.

Holy Sword

• Holy Sword Uralt (聖（せい）剣（けん）ウーア・アルト, Seiken Ūa Aruto^?) - As a hero, Kouki has the Holy Sword Uralt, a divine artifact which is a legendary weapon used by various heroes in the past. It is a unique artifact that possesses various abilities. The sword is blessed by the element of light and has the ability to weaken the enemies struck by its light while increasing the physical strength of the wielder. The sword can be summoned to the user's hand and for some unknown reason, it also possess the ability to automatically return to its owner without their consent, when they move away from it for a certain distance or try to abandon it. It can change its shape into whatever type of sword its user wishes, for instance, changing from its western design into a katana. The sword is made of minerals near the root of the Great Tree. It contains the soul of the first avatar of the Great Tree. Due to the unique construction of the sword, the sword cannot be modified to a great extent as making adjustments to the core can potentially weaken the sword instead of strengthening it. Despite the cutting power of the sword, the sword cannot cut through objects made of Azantium. It is the only piece of gear that Kouki retained as he returned the rest of his equipment that the Heiligh Kingdom issued to him...or to be more accurate, the sword refused to be parted with Kouki. In Tortus' post-Ehit era, it remains Kouki's signature weapon.

• Anime
• Light Novel

1/2

• Divine Armor (聖（せい）鎧（がい）, Seigai^?) - The strongest armor artifact in the Heiligh Kingdom. It is a set of nigh-impregnable western-style holy armor that increases the defensive capabilities of its wearer. It is later enhanced by Hajime after acquiring evolution magic so that it can absorb mana from its surroundings and lessen Kouki's mana consumption, as well as increasing the duration of his "Limit Break". It is also enhanced with the ability to form a veil of light to be used as a barrier.
• Aerodynamic-Enchanted Boots (空（くう）力（りょく）ブーツ, Kūryoku Būtsu^?) - A pair of boots that are imbued with "Aerodynamic" to allow the user to walk mid-air. They are also imbued with Gravity Rock that enable them to walk on walls.
• Airzone (エアゾーン, Eazōn^?) - A necklace artifact that modulates the climate to be at optimal temperature for its wearer.
  • Airzone Revised (エアゾーン改（かい）, Eazōn Kai^?) - An upgraded version of the Airzone necklace that also filters toxic substances in the atmosphere.
• Heavenly Eye (天（てん）眼（げん）, Tengan^?) - A pair of sunglasses that have been enchanted with "Riftwalk," "Foresight," "Night Vision," "Sense Heat" and "Farsight."
• Soul Shell (魂（たましい）殻（から）, Tamashī Kara^?) - A white marble that was enchanted with the spirit magic spell "Soul Resonance" that possesses the effect to convey one's will directly to the state of the soul, or possibly to the soul itself. It was originally designed to protect the wearer from the influence of Ehit's "Divine Edict."
• Bangle (腕（うで）輪（わ）, Udewa^?) - It grants its wearer the skill "Diamond Skin."
• Treasure Trove (宝（ほう）物（もつ）庫（こ）, Hōmotsuko^?) - A ring-shaped artifact that had a small, one centimeter ruby set in its center. The ruby was actually an artificially created dimensional space where things could be stored.
• Fairy Key (フェアリーキー, Fearīkī^?) - A key created using the unlimited magic power of the perpetual motion engine. It can transport anyone to alternate worlds by having the Fairy Ring act as a beacon for anyone wielding a Fairy Key to travel to the world that it resides in. It can’t be used to freely move anywhere like the Crystal Key, but its more or less an artifact for moving between worlds.
• Telepathy Artifact - It allows the user to communicate with others telepathically.
• Sonar Glasses - A pair of sunglasses that uses technology from the Factory World to emit sonar waves and can project a 3D image from them.
• Black Dragon (ブラックドラゴン, Burakku Doragon^?) - A massive airship that Hajime made for Kouki to aid him in his journey to restore the World Tree Branches. It's based off the Grandcypher from Granblue Fantasy, and appears as a wooden ship from the Middle Ages that is being carried by a large metallic black dragon. The ship's structure has three levels, with the deck having a width of 20 meters and two layers structure from the bow to the stern. There are many cannons protruding all around the ship's hull. Furthermore, the bow's cannon is decorated to look like a dragon's head with its jaw wide open. The core of the ship is the steering room. It contains a wooden steering wheel, leather sofa, and other furniture there that looks aged, despite being brand new. There is also a storage space and communication device, workbench and equipment to create various tools. Even though the inside of the galleon part below is made of metal, there are wooden boards laid out inside to give it an historical vibe. Furthermore, the boards ae deliberately stained to give the ship the appearance of being very old. Even so, the ship contains many modernized tools and facilities. It even contains a golem for maintaining and cleaning the ship's interior. The limbs of the metallic dragon that carry the ship act as stars towards the inside of it. Its head serves as an observation deck that contains magic mirrors that make the outside clearly visible. It is also possible to move the long neck to some degree in order to shift the view, or bring it closer to the ship. This ship is able to create a portal for instant travel, as well as travel fast with the restoration magic spell "Godspeed." Kouki originally wanted to name the ship "Endeavour," after the ship commanded by James Cook, but settled for Black Dragon after Myu had already named it that.
• Undine (ウンディーネ, Undīne^?) - A small ship that is meant to travel in areas that are too small for the Black Dragon. It has the appearance of a venetian gondola that could float midair using technology from the Factory World, but it has an illustration of a beautiful girl from a magical girl anime that holds a magic stick in one hand and has a perfect smile and wink. There is also splendid magical effects of stars and hearts sprinkled around the girl, as well as flowers blooming in profusion. The gondola's whole frame also has pink and white coloring and the tip of the gondola also has a pentagram motif that can light up in seven colors. Furthermore, the ship's oar is modeled like a magical stick and even had wings growing on the handle. The oar's length is about two meters. The handle is white and the tip is star-shaped that shines with a rainbow color. There is also a pink crescent moon decoration surrounding it. The ship wouldn't activate unless the rider did the gesture of pressing their forehead to the handle and saying the activation words "Here we go. Wake up, Undine" in a volume above a certain limit. The oar is actually designed with technology from the Factory World, and as long as it was being held, the ship could move following the holder's thoughts. The idea for the ship's design came from Myu, and was painted on by Hajime's mother Sumire. Despite its appearance, it is outfitted with various weapons, such as a magical gatling gun that is hidden in a part of the ship's prow. It can also deploy multiple spatial isolation barriers to protect against any harsh environment.
• Tree Compass (樹（じゅう）導（どう）盤（ばん）, Jūdō-ban^?) - A scaled-down version of the "Compass of Eternal Paths" that can locate all of the World Tree Branches.

Quotes

• (To Kaori): "This doesn’t make any sense. You’ve always been with me, Kaori... Why would you want to leave now? You’re my childhood friend... so... you have to stay with me. Isn’t that right?"
• (Trying to convince Kaori to stay with him and the others): "Kaori. You can’t go with Nagumo. I’m saying this for your own good. Look at him. He has girls all around him, and he’s even got a daughter now... Worst of all, he’s put a slave collar on that rabbit girl. And that black-haired girl called Nagumo her master earlier. He’s probably forcing them to come with him. Nagumo probably thinks girls are nothing more than objects to add to his collection. He’s scum. Look at how easily he kills people. And even though he’s so strong, he’s refusing to help us, his comrades. Going with him will only bring you misfortune. It’s better if you stay with us. No, I’ll make sure you stay with us. Even if you hate me for it, it’s for your own good. I won’t let you go, no matter what!"
• (Kouki trying to get Yue and the others to leave Hajime): "You girls as well. You shouldn’t stay with him. Come with me! Our party would love to have people as strong as you. We can save the human race together. You said your name was Shea, right? Don’t worry. If you come with me, I’ll free you right away. We don’t keep slaves here. You too, Tio. You won’t have to call Nagumo your master any longer."
• (To Hajime): "Hajime Nagumo! Duel me! No weapons! If I win, you have to promise to never get near Kaori again! And to release those girls you’re holding captive!"
• (Kouki lamenting his frustrations about Hajime): "Back when we were in Japan, he was a nobody. Just a lazy, unmotivated otaku who wasn’t even good at studying or sports. Always smiling like an idiot. He just did whatever it took to escape the situation he found himself in... He wasn’t even that nice to Kaori... Plus, he was an otaku... I’d never treat Kaori like that. I was always nice to her. I did everything I could for her... so how come Nagumo’s the one with the harem? He doesn’t even respect those girls! Besides, he’s a murderer! He killed that demon, even though she was helpless to resist. There’s something wrong with him! I knew it, it’s just too weird that Kaori likes him."
• (Kouki to Hajime when learning Ehit's true nature) "What do you mean?! Are you saying we've been pawns in the god's game this whole time?! Why didn't you tell us sooner?"
• (Kouki demanding that Hajime take his party to the Labyrinths): "There’s no way we can leave Liliana in the care of a guy who says he doesn’t care about this world. We’ll be her guards. Also, if you won’t do anything to save this world Nagumo, I will! But first, I need strength! I need the same ancient magic you have! If I travel with you, I’ll be able to obtain it too, right!?"
• (Corrupted Kouki to Hajime): "Nagumo, even if you’re a former classmate, don’t think you can get away with hurting my friends. I’m gonna kill you and free Kaori and the other girls from your brainwashing! Then I’ll save the world together with them!"
• (Corrupted Kouki to Hajime): "You—Guys like you always talk like they know everything! But I’m the one who truly understands Kaori and Shizuku! I’m the one who cares about them the most! I’m the one they should be together with! Not you! Not a shitty scumbag like you!"
• (Corrupted Kouki to Hajime): "It’s all because of you! If you weren’t here, everything would be perfect! Kaori and Shizuku would have always been mine! As the Hero, I would have saved the world! But you ruined everything! Even though you’re a murderer, even though you abandon people without a second thought, such a worst type of person like you, there is no way people would ever like YOU!"
• (To Hajime): "Please, Nagumo. Give it all back to me. I’m begging you, please just die."

Etymology

• The name "Kouki" means "light, happiness, good luck" (光) (kou) and "hope, brightness" (輝) (ki).
• Kouki's surname "Amanogawa" means "heaven/heavenly, sky, imperial" (天) (ama), "this" (之) (no) and "river, stream" (河) (gawa/kawa).

Trivia

• Ryo Shirakome based Kouki off of Saber from Fate/Prototype.
• Ehit specifically summoned Kouki and gave him the job of "Hero" due to how easy it was to manipulate Kouki as a pawn and his potential as an alternate vessel for the god to inhabit. The rest of his class that were summoned with him were simply extras.
• Kouki is Tortus' first hero to have been summoned from another world.
• Kouki is the only known character to have failed at conquering a Great Labyrinth more than once to acquire the ancient magic (the Sea of Trees of Haltina and the Frost Caverns of Schnee).
• While Kouki has never acquired a God's Age magic naturally by conquering a labyrinth, he does have a weapon that previously belonged to the Liberators.
• In the Web Novel, Kouki was not transformed into an apostle-hybrid after falling under Eri's mind-control.
• Although Kouki is not into manga and anime, he is familiar with several popular anime (such as Dragon Ball). However, he is a huge fan of Star Wars.