[Contractor] (Appearance, Age, Gender) - Brown hair and blue eyes / 22 years old / Male (Personality) - Playful and very mischievous. - However, he never lets his guard down in battle. (Other Traits & TMI) - Contracted with a demon. - His mark is a tattoo of demon horns and a tail on his right shoulder. - He reportedly met the demon after being hit by a car on the street and survived by contracting away 10 years of his lifespan.

[Augmented] (Appearance, Age, Gender) - Black hair and sclera / 22 years old / Male (Personality) - Sly and jokes around often. - Quite sensitive. (Other Traits & TMI) - He had a weak heart since childhood, so he modified his heart and right hand for self-repair capabilities. - He sometimes jokes, "Well, at least I won't die of cardiac arrest, lol."

[Augmented] (Appearance, Age, Gender) - White hair and purple eyes / 21 years old / Male (Personality) - A troublemaker. - Often shows a childlike side. (Other Traits & TMI) - He modified his left eye for hacking and information gathering. - He says he keeps his original eye safely stored in his room. - He hates being disturbed while working and dislikes being treated like the youngest or a child.

[Augmented] (Appearance, Age, Gender) - Silver hair and silver eyes / 26 years old / Male (Personality) - Blunt and quiet. - Introverted, but not entirely devoid of emotional expression. (Other Traits & TMI) - He modified his arms after losing both in a combat accident. - They look like normal arms on the outside, but they are solid iron inside. - He claims he has never lost an arm-wrestling match, even before the modification.

[Contractor] (Appearance, Age, Gender) - Blue hair and blue eyes / 21 years old / Male (Personality) - Quiet but says everything that needs to be said. - Doesn't seem like the type to let himself be taken advantage of. (Other Traits & TMI) - Contracted with an angel. - His marks are white wings and a halo. - His wings are connected to his nervous system, so he can feel sensations through them.

[Pure] (Appearance, Age, Gender) - Black hair and red eyes / 23 years old / Male (Personality) - Playful yet quiet. - Can be quite brazen at times. (Other Traits & TMI) - From a so-called upper-class family. - Raised sheltered, so he is naive about the ways of the world. - He loves weapons and even crafts them himself.

[Contractor] (Appearance, Age, Gender) - Brown hair and black eyes / 23 years old / Male (Personality) - Kind and relatively quiet. - Has a methodical, planning side. (Other Traits & TMI) - Contracted with a fox. - Has a mark shaped like a fox tail behind his ear. - He is quick-witted and can detect any lie the opponent tells.

[Contractor] (Appearance, Age, Gender) - Mint hair and mint eyes / 23 years old / Male (Personality) - Lacks tact but is bright. - Has an extroverted personality. (Other Traits & TMI) - Contracted with a salamander. - His mark is a mint-colored fingernail on his left pinky. - He has the ability to regenerate his own body.

[Pure] (Appearance, Age, Gender) - Mint hair and lime-green eyes / 22 years old / Male (Personality) - Quiet and introverted. (Other Traits & TMI) - Came here after living in an ordinary city. - Skilled at enemy position analysis and tactical design; he remains calm and has excellent judgment in crises, rarely falling for traps.