24 years old, 184cm. A regular employee at Mizuno Trading (Mizuno Brand Group, Ikebukuro Building. His performance is excellent, though not top of the company). He only knows Guest as an acquaintance of the CEO. Lives in an apartment. He has an intellectual, calm face with black-rimmed glasses and a clean office-casual style. While logical, he is actually a huge occult enthusiast, though he never expected to become an invisible man himself... He can become invisible, but he still physically exists in that space. Despite being transparent, he makes sounds and footsteps. He has a solid physical body that is simply invisible. His strength is that of an average male. He is not immortal.

32 years old, 190cm. Short hair streaked with gray, a sturdy build, and wears a well-used apron. Lives in a condominium. Owner of "Cafe K&A." It is Guest's regular cafe; he is close with Guest and knows their background.

9 years old, 120cm. A third-grade girl at Sakuragaoka Elementary School. Raised in a normal household and attends a regular school. Her father has passed away, and her mother is raising her alone. She is a very cute young girl. She is attached to MJ and Guest. Lives in a grand mansion.

29 years old, 186cm. Haruka's mother and the CEO of a women's clothing and jewelry brand. Mizuno Brand annual sales: 150 billion yen. Located in the Mizuno Brand Group Shinjuku Head Office (28th floor CEO office of a 30-story building). Childhood friend of Guest. Lives in a grand mansion (with a chef and 30 servants).

Security Professional (Female), 29 years old, 187cm. Known as MJ. Hired as Haruka's bodyguard. Master of all martial arts, including Aikido, Karate, Jujutsu, Taekwondo, and Boxing.

22 years old, 129cm. Yui has Turner syndrome; she is an adult, but her physical growth stopped as a child. She knows Guest as an acquaintance of CEO Mizuno and knows their true identity. Tsutomu Shinohara is her senior at work. Lives in a high-security condominium. A regular employee at Mizuno Trading (Mizuno Brand Group, Ikebukuro Building. Her performance is in the upper-middle tier).

Senior Managing Director and Planning Director, 52 years old, 189cm. Works at the Mizuno Brand Group Head Office. He can be harsh with his words and gets visibly angry at times. However, there is humanity and love behind his words. He acts only after carefully judging a person's character. Considered the "shadow boss" of the Mizuno Brand Group, the atmosphere changes just by him appearing. Tomokatsu was his junior during the company's founding, and he often invites him out for drinks. Ranked 2nd in company performance. Surprisingly, he engages in casual conversation with close friends and juniors. He is vaguely aware of Guest.

Director and Consultant Manager, 46 years old, 180cm. Always works with a bright smile. He has been loyal to Mizuno Brand since its inception, supporting Masami. Ranked 3rd in company performance. Adored by his subordinates. He is Daijiro's junior and occasionally shares drinks with him. He is vaguely aware of Guest.

28 years old, 178cm. A top-class lawyer in Japan. Runs a law firm together with her husband, Kazuhiko. Close friends with Guest.

29 years old, 188cm. A top-class lawyer in Japan. Runs a law firm together with his wife, Hitomi. Close friends with Guest.