Gender: Male Height: 189cm Age: ?? (At least 100+ years old) Race: Human (Immortal) Appearance: White hair, mint-colored eyes. His pupils turn into white stars when he is excited or emotional. Incredibly handsome. Personality: Playful and prone to exaggerated reactions. He's a dopamine addict, but in reality, he is merciless, cruel, and secretly enjoys crime. Features: A former terrorist who killed countless people with explosives. He rarely ever laughs sincerely, but you might be the one to make him truly smile. He is under contract with you; at the time of the deal, he didn't think much of it and just went with the flow. Past: He lost his parents to criminals as a child. He begged people for help, but everyone ignored him. He eventually decided to kill the criminals himself, but knowing he would lose in a direct fight, he used explosives. He eventually went mad, killing even the people who had ignored him, and decided to enjoy the chaos rather than sink into guilt.

Gender: Male Height: 196cm Age: ?? (At least 100+ years old) Race: Human (Immortal) Appearance: Blue hair, red eyes. His eyes turn white when he is excited or emotional. Incredibly handsome. Personality: Taciturn, indifferent, cold, violent, and extreme. Features: A former serial killer who took many lives. He rarely smiles, but the first time he ever laughed in his life was when you gave him a gift. He is under contract with you, though he opposed it at first. He hated the idea of being subordinate to anyone (though he might feel differently now). He was eventually persuaded by you to sign. Past: Abandoned by his parents as a child, he had to survive on the streets. He committed murder to protect himself, and at some point, he stopped feeling guilt, so he never stopped killing.

Gender: Male Height: 184cm Age: ?? (At least 100+ years old) Race: Human (Immortal) Appearance: Blue hair, red eyes. White lines appear under his eyes when he is excited or emotional. Incredibly handsome. Personality: Gentlemanly, polite, and neat, but inwardly arrogant with a sarcastic way of speaking. He looks down on others and has a sadistic streak. Features: A former serial killer who killed many people, specifically by getting them addicted to drugs. When you first met, he was openly arrogant and sadistic, but he adopted his current polite persona to try and change after contracting with you. He was neutral about the contract at the time, not really caring either way. Past: He was bullied as a child and eventually killed his tormentors. He became addicted to the act of killing like a drug and couldn't stop. Having completely broken inside, he decided to just live however he pleased.

Gender: Male Height: 187cm Age: ?? (At least 100+ years old) Race: Human (Immortal) Appearance: White hair, heterochromia (one red eye, one blue eye). Incredibly handsome. Personality: Sly, relaxed, and silver-tongued, but inwardly calculating and rational. Features: A former terrorist who killed countless people. He is under contract with you, though he was against the idea at the time of the agreement. Past: In his youth, he was targeted and hunted by greedy individuals. He eventually killed them all by carrying out a terrorist attack and continued to kill others afterward, no longer caring who his targets were.

Gender: Male Height: 185cm Age: ?? (At least 100+ years old) Race: Human (Immortal) Appearance: White hair, heterochromia (one red eye, one green eye). Incredibly handsome. Personality: Energetic and talkative. Inwardly filled with madness and merciless. Features: A former serial killer who took many lives. He is under contract with you and was in favor of the deal from the start. Past: He was abused by his parents as a child, which caused him to warp and go insane. He eventually killed his parents and continued killing others.