Daisuke Hiyama

Daisuke Hiyama was one of the students from Japan who got involved in the summoning incident, where he acted as leader of the group that would often harass Hajime.

Later, he acted as Eri's ally and aided her to plot against the Heiligh Kingdom.

Appearance
Daisuke was a young man with with short brown hair that fell flat on his head.

Personality
"Heheheheh... Hee hee hee. I-It was all his fault. Because that damn loser... g-got cocky... I-It was divine punishment. I didn’t do anything wrong... It was all for Shirasaki’s sake... Now she... doesn’t have to waste time with that loser... I didn’t do anything wrong... Hehehe."

- Daiske's inner monologue to Hajime Nagumo

Daisuke was obsessed with Kaori and enjoyed bullying Hajime due to the constant attention that Kaori was giving him. This would later escalate to physical violence after the whole class was transported in Tortus and was granted the ability to use magic.

Daisuke was shown to be a disloyal individual and would abandon others if necessary. He was willing join the enemies' side if stood to benefit him. After the incident he caused in the Great Orcus Labyrinth where he secretly attacked Hajime which supposedly killed the latter, he justified himself that his actions are for Kaori's sake. When he was discovered by Eri, he decided to help her with her plots against the Kingdom in exchange for Kaori.

Chronology
One Monday morning during his second year of high school, Daisuke along with his three friends were verbally harassing Hajime before class started. When it was lunchtime, the whole class was suddenly engulfed in a large glowing circle. Once it was over, everyone noticed that they were suddenly inside a large cathedral and they were approach by Pope Ishtar Langbard of the Holy Church, who explained to them that they had been summoned from another world to Tortus, in order to aid humanity with their war against the demons. The next morning, the whole class gathered at the palace courtyard to begin their training where they were greeted by the kingdom's Knight Commander Meld Loggins, and each were given a Status Plate artifact before he explained how it worked to everyone. As the students began to activate their plates, Daisuke and his friends started making fun of Hajime after it was revealed that he had the common job of "Synergist", as well as possessing average Stats. Over the next two weeks, the students trained in the kingdom in order to prepare for the war against the Demons. During that time, Daisuke and his friends continuously harassed Hajime by attacking him with their magic, but would stop whenever they were confronted by their classmates Kaori, Shizuku, Kouki and Ryutarou.

Once the students' initial training complete, they traveling to the town of Horaud in order to explore the Great Orcus Labyrinth, and battle the monsters that resided there as a way to gain combat experience. The night before the students began their exploration, Daisuke had been too nervous to sleep in the room of the inn. the students were staying in. He stepped out to go to the bathroom and feel the night breeze. As he was about to return to his room, he spotted Kaori in a negligee. He had been so surprised by her sudden appearance that he had reflexively hidden himself from her. Kaori hadn’t even noticed he was there as she passed by. His curiosity piqued, he’d followed Kaori and watched as she entered Hajime’s room. This immediately angered Daisuke at the fact that Kaori was willing to spend time with someone like Hajime, rather than him, and began to think of a way to get her to notice him.

During the their exploration into the Great Orcus Labyrinth, Daisuke tried to take a giant Glanz Crystal on the 20th floor, in an attempt to impress Kaori, but it turned out to be a trap and transported everyone to the 65th floor. They soon found themselves at a stone bridge and was trapped between a behemoth and an army of skeletal traum soldiers. Hajime managed to hold the Behemoth back his transmutation magic while the others managed to create an escape path through the skeletons. As Hajime rushed his way towards his classmates, Daisuke attacked Hajime with a fireball spell while everyone was busy bombarding the behemoth with their magic, and caused him to fall off the bridge.

After everyone else escaped from the Labyrinth and returned to the inn, Daisuke left that night to an isolated spot in Horaud. He squatted down and continuously spoke to himself about having killed Hajime without anyone being able to trace it back to him. It was then that he was approached by Eri who overheard him. After gleefully calling Daisuke a murderer, she threatened to expose Daisuke's secret unless he agreed to become an accomplice. Feeling corned by this choice, Daisuke was thinking of a way to kill his blackmailer, but his classmate managed to convince him to accept the offer of becoming a co-conspirator by promising to make Kaori his woman. Daisuke asked what his classmate wanted from all of this, but simply answered that it was something that didn't concern him. After Daisuke accepted the offer, the two of them headed back to the inn.

A few days after the students returned to the kingdom, Hiyama began to be shunned by the other students. As Hajime's apparent death began to sink in with them, they took out their anger on Daisuke, due to him having activated the Labyrinth's trap that transported them to the room where it happened. In an effort to earn their forgiveness, he got down on his knees and publicly begged them for it, in the hopes that doing it in front of Kouki, the class's hero, would help smooth things out with the rest of his classmates. Ultimately, his plan succeeded, and most of the students quickly stopped directing their scorn at him. However, Shizuku was still vaguely suspicious of him. Meanwhile, Daisuke began surreptitiously carrying out the orders he’d received from his blackmailer. Despite the dark nature of these orders, he had agreed to carry them out.

Daisuke was among the students that resumed their training in the Great Orcus Labyrinth, in spite of the dangers they knew it contained. As they managed to become stronger and advance deeper into the Labyrinth, Daisuke and his friends grew more arrogant and expressed their belief that they were invincible (though they remained humble while in the presence of Kouki and his friends). As they reached the 65th floor once more, they once again encountered the Behemoth and traum soldiers. Despite the lingering trauma from their previous encounter, as well as the fact that there were less people to fight it than before, the students managed to defeat the Behemoth and continued their journey down the Labyrinth.

Daisuke and the other students continued their training in the Labyrinth until they eventually reached the 90th floor. However, they soon realized that they were not being attacked by any Monsters. It was soon discovered that they had all been wiped out by other Monsters that were under the command of a Demon named Cattleya. She approached the students and offered them to join the Demons in the war against the humans, but Kouki immediately refused on their behalf and a battle ensued that forced the students to retreat to the 89th floor. However, Cattleya discovered their location and proceeded to attack them once more. In the end, she managed to defeat them after having incapacitated Kouki, and offered the students another chance to join the Demons. Daisuke voiced his desire to accept the offer, which immediately angered Ryutarou and proceed to call him a coward, but Daisuke argued that they had no choice, given the overwhelming strength of Cattleya's Monsters. Kouki tried to convince them to reject the offer, but Daisuke argued that they should focus on getting out alive no matter what. As Daisuke was about to accept Cattleya's offer, Kouki managed to free himself from the Monsters that were restraining him, and proceeded to attack the Demon, but stopped upon realizing that he was about to kill an actual person. As the Monsters resumed attacking the students and were on the verge of victory, they were stopped by the sudden arrival of a mysterious boy that had accompanied Kousuke Endou (who managed to escape the Labyrinth after Cattleya's first attack in order to find help for his classmates). When Kousuke revealed that was actually Hajime Nagumo who had come to their rescue, Daisuke was utterly shocked and immediately accused him of lying. Kousuke vouched for Hajime and even claimed that he saw his Status Plate earlier to confirm his identity, but Daisuke insisted that it had to have been a forgery of Hajime's Status Plate. Hajime's companion and lover Yue magically doused Daisuke with water and demanded him to be quiet. Daisuke was unable to argue after seeing Yue intensely glare at him. Once Hajime eliminated all of the Monsters and killed Cattleya, Daisuke joined Kouki in criticizing Hajime for having killed a defenseless opponent, in a bid to discredit him in front of Kaori, but this proved unsuccessful.

As everyone was making their way out of the Labyrinth, Daisuke and Reichi attempted to get closer to Hajime's companions Yue and Shea, but the two girls ignored them completely. This annoyed Daisuke, and he tried to grab Shea’s ears, but was hit by a rubber bullet from Hajime.

When Kaori decided to accompany Hajime on his journey after they returned to Horaud, Daisuke begged Hajime to rejoin their party, in order to keep Kaori close by, and even apologized for his previous bullying. However, Hajime refused his offer by subtly dropping hints that he knew that Daisuke was the culprit behind his fall into the Labyrinth's Abyss. Daisuke became nervous at Hajime's words, to which Hajime followed by calling him and his friends worthless and threatened to kill him if he got in his way. While his friends were outraged by Hajime’s attitude, Daisuke instead complied with Hajime before telling his friends to back down. At first, they were surprised by Daisuke’s uncharacteristic obedience, but his serious tone brooked no argument, so they too gave up on persuading Hajime. As Kaori was packing her belongings from Horaud's inn before setting off, Daisuke ad his friends offered to go with her, but Hajime prevented them from going.

The night after Hajime's departure with Kaori, Daisuke travelled to one of Horaud’s public parks, and vented out is frustration over having lost his love interest, by punching the surrounding trees while cursing. Just then, his accomplice (Eri concealed in the shadows) appeared from behind the bushes and openly mocked him for having lost the women he desired. This only served to further anger Daisuke, and threatened to no longer be treated as a slave since Hajime was alive, but his partner assured him that Kaori would still become his once she returned to the kingdom by incentivizing her to protect her friends. Daisuke decided to continue aiding his co-conspirator, despite knowing that meant betraying the rest of his classmates.

Daisuke participated in Eri's plan to allow the demons to invade Heiligh. One evening, Daisuke approached Meld in his room and asked for his help with something. When Meld invited him in, Daisuke was hesitant to talk about what was wrong, but Meld assured them that they could work it out together. However, their conversation was cut short when the Knight Vice-Commander Jose Rancaid approached Meld's room as well. Daisuke offered to wait in the hall until Meld and Jose were done talking. As Meld opened the door, Jose suddenly attacked him with his sword, but Meld dodged him before grabbing his own sword. As the two knights fought, Meld was about to unleash a wind spell on Jose, but was interrupted when Daisuke suddenly stabbed him from behind. Meld, however, instinctively dodged it fast enough to avoid it hitting his heart, much to Daisuke's annoyance. Meld attempted to interrogate Daisuke about his sudden attack, but he ignored Meld, and once again tried to stab Meld’s heart. Meld then cast his spell and unleashed a compressed ball of wind that slammed into the floor and sent all three of them away in different directions in the room. Meld then regained his bearings and was about to attack Daisuke, but was intercepted by more knights that suddenly appeared. Despite Daisuke and the knights attacks, Meld managed to counter them before being tackled by Daisuke. After Meld managed to subdue the remaining knights, Daisuke expressed his frustration at his inability to kill Meld, and even called him a monster due to his skill. Meld, however, claimed that he simply had much more experience when it came to fighting people and hoped that his recent display of fighting prowess would be enough to get Daisuke to surrender. Instead, Daisuke mocked Meld for his confidence before even more knights came to his aid. As Meld was suddenly surrounded, Daisuke demanded that Meld let himself be killed, but Meld decided to flee and jumped out of a window and landed safely outside by using his wind magic. Unfortunately, Meld was killed moments later by a mysterious woman. Afterwards, Daisuke was approached by his accomplice and the two of them discussed despite how they needed the aid of that woman to kill Meld, their plans were proceeding smoothly after having gotten rid of the last obstacle in their way.

Several days later, when the demons invaded the Heiligh Kingdom, all of the students discovered that Eri betrayed them after she commanded her army of undead knights to subdue her classmates within the palace courtyard. When Eri attempted to kill Shizuku, she was stopped by Kaori, while being guarded by barrier magic from Princess Liliana. Eri ordered her knights to attack the barrier, and one eventually managed to break through, but Daisuke suddenly appeared and beheaded the soldier. At first, he appeared to have come to rescue Kaori and Liliana, but Shizuku suspected it to be a trap and attempted to warn them. However, Daisuke stabbed Kaori from behind as soon as she let her guard down. As she lay dying, Kaori used the last of her strength to cast a healing spell on her classmates in order to help free them from Eri's knights. Daisuke attempted to stop Kaori by continuously ramming his sword through her, but she succeeded in unleashing her spell, though she was unable to heal herself due to the severity of the wound. As Kaori's classmates attempted to rescue her, Eri began to cast her "Spirit Binding" spell on Kaori's body in order to turn her into an undead minion for Daisuke. However, before she could complete her spell, Hajime suddenly arrived and caused everyone to freeze in fear. He took advantage of this brief pause and immediately approached Daisuke with such incredible speed. Hajime knocked him straight into to the courtyard wall, which left him half-buried in the rubble. Daisuke spasmed and coughed out blood. His internal organs had been pulverized, and most of the bones in his upper body shattered. The pain was so great that it knocked him unconscious, and then woke him up again, but rendered him unable to move.

When Eri was about to get killed by Hajime, Daisuke attacked him but was easily neutralized before being sent flying to the courtyard, where he was eaten alive by a group of monsters.

Sometime after Daisuke's classmates returned to Earth, Hajime and Aiko visited his family and told them about his death.

Hajime Nagumo
Hajime was one of Daisuke's classmates whom he despised the most. It was because Kaori was close to the former that he decided to make his life as miserable as possible. His hatred towards Hajime rose further when, one night, he saw Kaori come out of his room. This event caused Daisuke to harbor ill intent against him. Later, he secretly attacked Hajime during an incident in the Great Orcus Labyrinth, which caused the latter to fall into the lower levels of the labyrinth. After finding out about Hajime's survival, Daisuke felt scared and intimidated after he witnessed Hajime's newfound strength and power. When Hajime foiled his plans, Daisuke blamed him for all of his misfortunes.

Kaori Shirasaki
Kaori was Daisuke's classmate, with whom he has an obsession. At first, he simply admired her from a distance due to her constantly hanging around Kouki. However, after seeing how close she was to Hajime, he decided to make her his. He was even willing to kill her if necessary and turn her into an undead with Eri's necromancy.

Eri Nakamura
Eri was one of his classmates. After she discovered Daisuke was the one responsible for Hajime's fall during the incident inside the Great Orcus Labyrinth, he was forced to work with her as her accomplice.

Physical Abilities

 * Enhanced Physical Abilities - Being a summoned hero, Daisuke was granted more advanced physical abilities than the average human in Turtos.
 * Enhanced Stamina - Being a summoned hero, Daisuke has more endurance and stamina than the average human in Turtos.
 * Expert Swordsman - Daisuke was shown to be skilled and proficient in using swords due to his job as a light warrior. Combined with his enhanced physical abilities, he was able to best Vice-Commander Jose Rancaid, who is a great master swordsman and the second strongest knight in the kingdom, in a one-on-one duel.

Skills

 * Sword Art - A skill that increase efficiency in using a sword.
 * Wind Magic Affinity - It allows the user to use wind magic at a capable rate.
 * Language Comprehension - 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.

Spells/Attacks
Fire Magic
 * Fireball - One of the most basic fire spells.

Weapons & Equipment

 * Longsword - As a light warrior, he was given a longsword as his main weapon.

Quotes

 * (To Hajime): "Ish all your fault! If it washn't for you, Kaori would've been mine!"
 * (To Hajime): "I’ll kill you! No matter what ish takesh, I swear I'll kill you!"

Etymology

 * The name Daisuke means "big, great" (大) and "help, assist, between, shellfish" (介).
 * The 介 (suke) in Daisuke's name is a Japanese kanji reading of jiè.
 * Daisuke's surname Hiyama means "white cypress" (檜) and "mountain" (山).

Trivia

 * Daisuke was the third member of the class to die.