Kouki Amanogawa/Relationships

Seiji Amanogawa
Kouki's father. Kouki inherited his physical appearance from him. Kouki loves his father very much.

Miya Amanogawa
Kouki's mother. Kouki inherited his wanderlust and troublemaking habits from her. It is due to her worrying that Kouki might inherit her troublemaking nature that she made him enroll as a student of the Yaegashi-Dojo. Kouki loves his mother very much.

Mitsuki Amanogawa
Mistuki is Kouki's younger spoiled bratty sister and the head of the Soul Sisters. Mitsuki is disappointed at her brother for not able to make Shizuku his wife as a result for Mitsuki called Kouki an idiot due to Shizuku loving Hajime Nagumo for his misguided justice which almost broke his relationship with Shizuku. Kouki doesn't know about his sister's darker nature due to her hiding it from him and Shizuku.

Hajime Nagumo
At first, Kouki once considers Hajime a bother, viewing him as constantly fawning over Kaori due to his convenient interpretation of her attitude towards him. Later, after their reunion in the Orcus dungeon, seeing him becoming stronger and surrounded by many girls along with Kaori, who eventually decided to follow Hajime, he became jealous of him. This also coupled with fact that both of them have different ways of thinking. After being saved twice during the attack on the kingdom, rather than being grateful, he became even more jealous of him.

Hajime for the most part views Kouki as a nuisance and an idiot that he wants to avoid dealing with due to his naive mindset and troublesome habit of interpreting things to fit his worldview. It is due to these traits that Hajime decided not to reveal that the god Ehit who had summoned them to be heroes was a twisted Evil God that viewed living beings as playthings or the fact that Daisuke Hiyama attempted to kill Hajime, since Kouki's idiotic idealistic mindset would never allow him to doubt those who are praising him. Kouki bitterly acknowledged that he wouldn't have believed Hajime if he revealed the truth about Ehit.

Kouki is so much ignorant as he stupidly believed Hajime was a nobody who was just a lazy otaku that doesn't study or do sports. He thinks Hajime smiles like an idiot. He foolishly believed Hajime is just a murderer who "doesn't treat" his harem nicely and killed Cattleya even though she no longer can fight anymore. Kouki furiously questioned why Hajime is the only one having harems with him while Kouki doesn't. However, Shizuku correctly countered to Kouki's thinking and told him that he doesn't know a single thing of Hajime who he is or who he was and his harems are always happy for him. Shizuku also telling to Kouki that he is the only one who's ignoring reality and only convince himself that Hajime is a demon who doesn't deserve Kaori.

Unlike his other classmates who got praised and respects from Hajime, Kouki is the only one who never got any praise from Hajime at all due to his lack of resolves when he continually enforcing his delusional habits of "justice".

At first, Kouki believed he can still defeat Hajime in terms of hand to hand combat when Kouki challenged Hajime to a fight without weapons in order to leave Kaori and his harem with him if Kouki had won, not taking seriously Hajime's previous warning of how he will massacre even his classmates if they dare to cross him. For his insolences, Hajime gripped Kouki and simply dropped him to a pitfall of non-lethal bombs to humiliate him following his defeat by Hajime. It was only during the war at Heiligh Kingdom, Kouki became gutless to go against Hajime due to having witness his true power by destroying a zombified Meld and the other zombified knights whom were the finest warriors of the Heligh Kingdom and also particularly demonstrated when Hajime ruthlessly brutalized the traitor, Hiyama who was one of the strongest among Kouki's fellow heroes with his bare hands without any effort at all, showing not just Hajime's immense superiority to himself in terms of physical power alone, and also allow Kouki to finally realized the terrifying extends of Hajime's savage brutality, by throwing Hiyama to be eaten alive by monsters. Following Hiyama's death, Kouki angrily blamed Hajime for indirectly causing the deaths of Meld, Kondou and the other Heligh Knights and soldiers and the near-destruction of the Heligh Kingdom by not telling him about Ehit's malice towards humans by manipulating them via religious worships and Ehit's schemes in using them as pawns such as sending Noint to assist Hiyama and Eri in betraying him and the party by brainwashing the nobles and king Eliheid himself, nearly leading to their deaths in Eri's death trap and also Kaori's murder who nearly became Hiyama's undead sex slave, in response, Hajime told Kouki even if he did bothered to tell him about Ehit's true nature as an evil god, Kouki's idiotic naivety and delusional self-righteousness will just led him to disregard Hajime's warning by elborately pointing out his habit of interpreting things to his own convenience and Kouki's pride in his efforts as Ehit so called chosen hero, even correctly stating that just like the Holy Church and Heligh Kingdom, Kouki will even get mad at Hajime for supposedly slandering Ehit. Unable to deny this statement due to Kouki's being fully aware of his complete confidence and beliefs in his misguided justice, Kouki claimed that Hajime can still convinced him by thoroughly explain it several times, an annoyed Hajime sharply insulted Kouki, scolding the latter that unlike Shizuku and Ryuutaro, he has no reason to specially put in extra effort just to suit the convenience of Kouki's misguided delusional justice, reminding Kouki it is precisely his naive expectations that classmates are always obligated to help and protect each other that allowed not just the intelligent Eri but even an idiot like Hiyama to manipulate and then betrayed him without even noticing. Though Kouki cannot deny how his ideals had only let those under his commands to betray the party, he still condemned Hajime after murdering Hiyama despite the latter being a traitor who had helped Eri in massacre Meld and the Heligh Kingdom's knights and temporarily murdered one of his best friend Kaori before her revival. Kouki was further upset that despite his immense power, Hajime didn't believe he need to uses his power for "justice" by saving Tortus from Ehit's manipulation because that's not what he wants, as the reason why he risked his life attaining Age of God's Magic in the Great Labyrinths was simply to return home with his harem, Hajime criticized Kouki's weak resolve and naivety which is what led to his own failures in the first place, outright telling Kouki that he does not care about his misguided justice, warning Kouki, if he kept continue to enforce his stupid justice upon him, it will be Kouki's turn to die a miserable death by Hajime's hand similar to Hiyama.

Hajime reluctantly agreed to Kouki's request to join him in conquering the last two Labyrinth, due to Shizuku, Suzu and Ryutarou's begging.

After Kouki and his party joined Hajime's journey to conquer the remaining Great Labyrinths, Kouki's idealistic worldview and his desire to save everyone clashed with Hajime's more pragmatic worldview and his desire to prioritize returning home above all else. Kouki repeatedly attempts to impress his ideals onto Hajime or lecture him about saving the world, which Hajime tried to ignore, simply asking Shizuku to handle Kouki's tantrums and outburst, It was only in Hoelscher Empire did Hajime nearly lost his patience with Kouki, angrily warned Kouki that he doesn't care about his justice and unlike Shizuku, Kaori and Ryutarou, they are not friends nor comrades and certainly do not believed in the same ideology of justice, he is no longer obliged to obey him as Ehit's chosen hero, reminding Kouki of his original purpose in accompanying him to conquered the last remaining Labyrinths which Hajime can reject if Kouki dares to anger him again. Kouki tends to try to interfere in situations where it seems that Hajime is at first reluctant to act and tends to disapprove of Hajime's more ambiguous actions such as helping the Haulia defeat the Empire. While Kouki is initially confident that he can easily clear a Labyrinth and become as strong as Hajime, he discovers how wide the distance between their strength is. After his personal failure in conquering the Haltina Labyrinth, Kouki allowed Hajime to enhance his sword and his armor despite of his dislikes for Hajime in order to have a better chance to successfully conquered the last Labyrinth. Kouki is reluctant to accept help from Hajime so much so that he initially refuses to use the new abilities of his Holy Sword that Hajime added due to the fact that he wants to prove he is stronger then Hajime. However, his attempts to prove himself to be stronger than Hajime has become even worse when he always failed to clear even a single labyrinth and Hajime had cleared all the Labyrinths excluding the Orcus Labyrinth with ease meaning he failed to surpass Hajime and he is inferior to him in both willpower and body.

Due to Hajime's new appearance and atmosphere as well as the fact that Hajime was surrounded by a harem of beautiful girls which even included his childhood friend Kaori (who has a greatest love for Hajime since middle school), Kouki became jealous of his ability to attract beautiful girls and Shizuku (who also later fell in love with Hajime) claimed that Hajime has become more popular than Kouki.

He eventually snapped after seeing Shizuku with Hajime together and finally noticing her growing affection for the latter. During the final trial in the Frost Caverns of Schnee, he was forced to confront his worst personality traits in the form of a doppelgänger, who encouraged these self satisfactory delusions and taunted him further in his failures, shortcomings and his inability to see things for what they truly are. This eventually caused him to lash out instead of accepting and conquering these negative feelings and aspects of himself and acknowledging them, choosing to believe that Hajime was only a monster who brainwashed not only Shizuku, but all his other companions to get what he wanted in order to better fit into his delusional world view, and tried to kill Hajime to fufilled his misguided justice. Kouki furiously asked Hajime why does everyone likes him and loyal to him even though he is a murderer and how could he become so strong. Hajime finally fed up with Kouki's delusional justice, did not hesitate to retaliate back with brutal force, having no qualms shooting his kneecaps and also ruthlessly thrashed Kouki while sharply criticizing the latter the reason why he ended up failing everything he did up to his own trail in the Schnee Labyrinth is because of Kouki's choice to priotize his foolish pride and stubborn adherence in his childish misguided justice over the importance of realizing his own goals,  despite wanting to kill Kouki via fatal shots to his vital points out of his ruthless pragmatism, Hajime ultimately chose to not to kill Kouki because it would have made Kaori and Shizuku sad. Simply chose to use Grentzen to separate Kouki's fusion with his doppleganger and punch Kouki unconcious, allowing Kaori to heal Kouki albeit only to a point where his life is not in danger as Hajime knew that if Kouki were to immediately regain conciousness and learnt of his failure in defeating his trial subsequently his second attempt to gain Age of God's Magic, Kouki will simply vent his increased frustration by attacking Hajime again. After waking up and calming down, Kouki felt bad about how he attacked Hajime. However, he still couldn't accept Kaori or Shizuku's feelings for him.

While Hajime and Yue were creating the Crystal Key to bring them back to Japan, Kouki and the others experienced what Hajime went through when he fell in the Great Orcus Labyrinth. Witnessing the pain, suffering and loneliness Hajime went through and his determination to return home, Kouki finally realized where Hajime's immense power came from and understood why he felt he couldn't match him; because of the difference in resolves between them. After seeing Hajime's memories, while he sympathizes with Hajime's desire to return home, Kouki still maintains that Hajime has stolen everything from him and thinks that he is not mistaken in his beliefs.

In the After Story, Kouki has trouble sorting out his feelings towards Hajime as due to his past actions, Kouki cannot bring himself to be angry at Hajime but rather disappointed at himself for being indecisive and not strong enough to realize his ideals. When the "Dark Being" attacked, he thought about asking Hajime to transport the "Dark Beings" to another world, so that the people of Synclea Kingdom could be safe and the "Dark Beings" could survive without harming others. He was reminded of Hajime's way of prioritizing those close to him when he heard Koone's wish to save her sister above all. When Kouki was about to escape from Arquette that was attacked by the Dark "Beings", he thought how he wanted to meet Hajime again along with his family and friends. After defeating the "Dark Beings" that were attacking Arquette, Kouki resolved himself to fight for the sake of what he believed while accepting everything in contrast to Hajime's view of dividing the world between enemy and ally. Kouki and Hajime finally reunited when Kouki was about to be attacked by a pack of "Dark Beings", as Hajime dispatched them. Hajime then asked Kouki to go back with but Kouki refused as he wanted to save Moana. Thinking that his hero complex has returned, Hajime said that he would call Shizuku to give him a lecture but Kouki resolved himself to stay to save Moana. After the rest of Kouki's friends left the decision of Kouki's retrieval to Hajime, Hajime wanted to confirm if Kouki thought that his choice was correct to him, to which Kouki responded that such a thing didn't matter, an answer which impressed Hajime. Hajime went to defend Arquette so Kouki could save Moana as he sent Kouki off with the aid of griffon Grim Reapers. When asked by their friends why Hajime lent Kouki his aid instead of dragging him back, it is revealed that Hajime was curious as to where Kouki (who has obtained an answer which is the opposite of Hajime) is going to end up. After helping defeat the "Dark Beings", Hajime was willing to grant Kouki's request of taking Moana with him.

Ryutarou Sakagami
Ryutarou is one of Kouki's closest friends. Kouki and Ryutarou have known each other for a long time and have a deep bond. Kouki knows that he can always count on Ryutarou to support him and Ryutaro will always try his hardest to stand by Kouki and his friends to try to help them. While the two have a good relationship, Ryutarou is secretly jealous of Kouki due to Ryutaro being weaker then Kouki and due to Kouki being percieved as a main character who gets all of the fame and women to fall for him compared to Ryutarou who is just there to support the main character. However, despite this jealousy, Ryutarou still cares for Kouki and genuinely sees him as his oldest dearest friend and desired to obtain enough strength and power "beat some sense back into him" when he began to lose his way.

Kaori Shirasaki
Kaori is one of Kouki's closest friends. Kouki has always respected Kaori for being a kind person. But due to his denseness, he never notices that Kaori loves Hajime and thought she felt bad for Hajime who is always alone. More than once, he doesn't realize that what he says hurt Kaori more than help her, such as after Hajime falls into the abyss. When Kaori confesses to Hajime and declares that she would be going with him, Kouki couldn't accept it or believe that she really loved Hajime the whole time. Later upon mentally hitting his breaking point in the final trial of the Frost Caverns of Schnee battling his doppelganger, Kouki came to the delusional and convenient conclusion that Kaori did not truly love Hajime, but was instead "brainwashed" by Hajime into loving him. He later brazenly proclaimed that she along with Shizuku "belonged" to him due to their childhood friendship, that he interpreted as romantic love, causing him to try and kill Hajime to "free" her. Kouki hurt Kaori's feelings as goes as she slapped him in the face and caused her to be angry and sad for his so-called "righteousness" of failed attempts on killing Hajime and begged to stop the madness following his defeat by Hajime. After he gave up his attempts of killing Hajime, Kouki gave up on his love for Kaori as he now fell in love with Queen Moana de Shelt Synclea as he finally accepted that Kaori was truly in love with Hajime and would not return his affections.

Shizuku Yaegashi
Shizuku is one of Kouki's closest friends. They have known each other for around 10 years and are usually seen together. However, unlike Ryutarou who blindly supports Kouki, Shizuku usually tries to get Kouki to think before acting. At times, Kouki will open up about his feeling to Shizuku, but to his dismay, she tends to point out where he's wrong rather than tell him what he wants to hear. After Kaori decided to travel together with Hajime, he pleaded with Shizuku not to leave him, which she doesn't promise. Shizuku usually meditated the conflict between Kouki and Hajime as Kouki usually clashed with Hajime's choices during their travels. Later upon realizing that Shizuku also bore romantic feelings for Hajime, Kouki could not believe or accept it, as he had believed that Shizuku promised to never leave him when she agreed to look after him and the rest of the hero party. This caused him to delude himself into thinking that Shizuku was in love with him, eventually causing him to conveniently interpret this situation as Hajime "brainwashing" her to love him, leading him to willingly attack and fight against Shizuku in order to "save" her and was even willing to resort to extreme, possibly fatal force to accomplish this. However, despite this violent behavior, Kouki still saw her as a friend and promised to help her recover after defeating Hajime and "freeing" her. Later upon being defeated by Hajime, Shizuku clarified that she does indeed love him, but not in the sense as a lover, but something akin to a troublesome younger brother, once again repairing their friendship. However, Shizuku made it clear she wasn't asking for his blessing in regards to her feelings for Hajime and was simply telling him because he's her childhood friend. Following his defeat, Kouki gave up for his romantic feelings for Shizuku and let her be with Hajime as Kouki has a new lover Moana de Shelt Synclea. Unknown to Kouki, his spoiled bratty sister, Mitsuki tried to destroy Shizuku's wedding photoshoot with Hajime only for her to bullied by Hajime.

Eri Nakamura
Eri see's Kouki as her savior and will do anything for him to be her's. Eri has harbored an obsession with Kouki ever since he saved her from commiting suicide to escape her abusive mother. She has harbored love for him ever since that moment and was thrilled to come to Tortus where she had the opportunity to make Kouki hers. During Cattleya ambush of the Hero party, Eri was willing to sacrifice all of her classmates if it meant that she and Kouki would be safe. She later betrayed the Heiligh Kingdom and her classmates to the demons if they promised to spare her and Kouki. Kouki was at first unwilling to believe that the kindhearted girl he knew would betray him and his classmates but was forced to accept reality after Eri revealed her schemes and was forced to accept the truth when Eri retreated with Freid and Aiko revealed Ehit's nature as Evil God. When Kouki snapped at the Frost Caverns of Schnee, he though Hajime had "brainwashed" Eri as well, believing he was the reason why she betrayed them.

Daisuke Hiyama
Before transport into Tortus, Kouki was bothered by Daisuke Hiyama's lust of Kaori. After the Hero Party escaped the Orcus trap that Daisuke accidentally activated due to his carelessness, Daisuke prostrated himself in front of the Hero Party and Kouki especially as he knew that due to Kouki's hero complex, Kouki would easily accept his apology and smooth things over with the rest of the party. Following Daisuke's betrayal by siding with Eri and Ehit to massacre him and his classmates and the Heligh Kingdom knights including personally killing one of his best friends Kaori to make her his undead sex slave before his eyes, Kouki holds a hostility on Daisuke for his treachery. However, Kouki was not pleased when Hajime brutalize Daisuke and toss him to be devoured alive by the demonic monsters. Furthermore, when Kouki blamed Hajime for not warning them of Ehit's schemes earlier that allow Eri and Hiyama to betrayed them, Hajime coldly reminded Kouki it is his delusional idealism at fault he and his classmates had nearly died and precisely Kouki's naive expectations that fellow classmates must be obligated to help and protect each other is what had allow even an idiot like Daisuke to manipulate and backstabbed him without ever realizing it, which Kouki bitterly acknowledged and could not deny. Hajime also warned Kouki if he intends to continue test his patience by enforcing his misguided justice onto him and his friends (harem), Kouki will meet a brutally painful and miserable death just like Daisuke did. Despite Daisuke's treachery, when Kouki became corrupted in the Frost Caverns, Kouki still condemned Hajime for murdering Daisuke.

Ehit
Ehit had chosen Kouki to be a potential vessel thus blessed him to be the strongest out of his summoned Heroes by giving him the Job Class of Hero as well as having the highest stats and most amount of Skills out of his classmates. Kouki due to his misguided sense of justice and inability to differentiate between good and evil proved to be one of Ehit's easiest to manipulate pawns, having trained hard in preparation to participate in his war, even attempted to recruit Hajime's extremely powerful party members, Yue, Shea and Tio to joined him in fighting for Ehit. Hajime even stated Kouki will never want to believed that Ehit whom the Humans had worshiped and had also specially chosen him to be the Hero is in reality an Evil God and all his efforts in fighting for Ehit are meaningless and would even get angry at Hajime for supposedly villainizing Ehit, a fact which Kouki could not denied. However, after learning from Aiko of Ehit's true nature as an Evil God and his manipulative schemes of using him and his classmates as pawns for his game of death including the fact that Eri had personally exposed how Ehit had helped her in betraying them by sending Noint to abduct Aiko and brainwashed King Eliheid and his nobles during her death trap, Kouki despite his misguided sense of justice, begrudgingly forced to accept the truth of Ehit's evil nature and thus lost any respects for the God due to his atrocities.

After being told by Hajime that he has no desire to save the people of Tortus from Ehit's manipulations, Kouki affirmed that he would save Tortus by obtaining the power of Ancient Magic to defeat Ehit and demanded that Hajime take the Kouki and the rest of the Hero party with him to conquer the last remaining Labyrinths.

Ehit revealed that he summoned Kouki as a pawn in his game to balance the board by helping the Human side since Freid obtained the power of Ancient Magic. He also had plans of making Kouki his host body before he rediscovered Yue.

Meld Loggins
Meld pays special attention to Kouki due to the later's vocation of "Hero". He would begrudgingly prioritize his safety over the safety of the other students. After the fight against Cattleya in the Great Orcus Labyrinth, Meld apologizes for not teaching Kouki that he will have to be ready to kill his enemies when the time comes, a mistake that almost cost Kouki and the others their lives because Kouki failed to bring himself to kill the demon when he had the chance. When Eri later uses Meld as one of her undead soldiers, Kouki was shocked and sadden to see what had happen to his mentor. Despite knowing Meld was already dead, Kouki couldn't bring himself to strike him down and end up hesitating too much. Kouki was saddened by his death as Meld was the person who helped Kouki the most in Tortus.

Moana de Shelt Synclea
Moana is the Queen of Synclea Kingdom that Kouki is summoned to in order to save her people from a race of creatures called the "Dark Beings". Moana quickly establishes a friendly relationship with Kouki who is the hero that Foltina summoned even asking him to call her casually with him being reluctant to do so at first. Moana notices that Kouki is struggling with some internal conflict as they discuss what it means to be a hero as she later apologizes for forcing Kouki to kill for the first time, seeing as it traumatized him a bit. She acknowledged his kindness but Kouki vented his feelings self-loathing as he told her that he is scared of himself as he cannot trust his own judgement. When he heard how she risked her life in a climatic battle against the "Dark Beings" while straining her health to protect her kingdom, Kouki stated that he admires her. When they were staying the capital, they discussed their motivations and reasons for fighting, thus growing closer as Moana stated that the two of them are the same since they want to keep fighting for the sake of others no matter what happens to themselves. After Kouki stays behind to defend Arquette, Moana rallies reinforcements to support him as she would not let him die while he was fighting for her kingdom's sake. When she witnesses Kouki, who was nearly fatally wounded as had cut down several thousand Dark Beings for the sake of of protecting the people of Arquette, she became tearful and enamoured with him. As Kouki was recovering from his injuries, Moana hugged him as she was relieved that he survived. When Kouki told her that he had found his answer, Moana promised that she would support his choice no matter what it was as she wanted to become his strength, as Kouki started calling her by her name and talking to her casually. After witnessing Lillin kissing Kouki on the cheek, Moana momentarily wanted to push down Kouki, who still could not move. When Moana attempted to confront the "Dark King", Kouki was able to come to her side, rescuing her and defeating the "Dark King" thus ending the threat of the "Dark Beings".

Moana decided to accompany Kouki back to Tortus, where she adventures beside him while engaging in catfights with the Goddess that also fell in love with Kouki.

Former Goddess
The former Goddess is one of Kouki's two companions and lovers. She fell in love with Kouki and had catfights with Moana which caused Kouki to be annoyed.