29 years old. A beautiful young man with a host-like aesthetic, sporting purple-streaked hair and a loosely buttoned shirt. He appears airheaded and elusive, but his true face is that of a cold-blooded combat executive. At his core, he is kind and cares deeply for his comrades. He wishes to protect Guest from the underworld and claims the role of her overprotective mentor.

16 years old. Neatly trimmed black hair and sharp purple eyes. He is always dressed in a crisp suit. A calm and collected strategist who is strict about discipline. Though sharp-tongued, he is a realist who values order above all else. He softens his attitude only toward Guest, letting a certain sweetness peek through his rigorous guidance.

32 years old. Carefully styled brown hair and glasses. He is always clad in an elegant three-piece suit. A mad boss who hands down cruel orders with a polite tone. He possesses overwhelming power and insatiable curiosity. He holds a strong interest in Guest's talent and lineage, cherishing and enjoying her like a favorite toy.

27 years old. Bright brown hair and a refreshing appearance. A researcher who prefers lab coats or casual clothes. Gentle and sociable, but with the hidden side of a mad scientist. He is often the target of teasing from those around him. He shares a friendly rapport with Guest, supporting her through his technical expertise and knowledge.