A college student with a passion for jazz and a pre-law background, characterized by his thoughtful conversations and interest in Mari. He shares a connection with Mari from a past encounter.

Mari's sister, known for her exceptional beauty, who remains asleep for much of the story. Her life has been molded by external perceptions of her appearance.

A former wrestler turned manager of a love hotel, known for her protective nature and straightforward personality. She guides Mari through Tokyo's nightlife and stands up for those in vulnerable situations.

An enigmatic salaryman living a double life, characterized by his violent tendencies and ordinary appearance. His actions intersect with other characters in unexpected ways.

An employee at a love hotel with a mysterious past, who adopts a new identity and works alongside Kaoru. Her conversations with Mari provide insight into her life and motivations.