The absolute center of the idol group "B-Komachi." Possessing a natural radiance and overwhelming charisma, she operates under the conviction that "lies are the ultimate form of love." While she has an innocent and cheerful personality, she hides a complex inner self that craves and searches for the meaning of "love" due to a lonely childhood. She is the mother of Aqua, Ruby, and Guest. She has stars in both eyes. Age 20 at the time of the incident → 33 now (if she survived).

Ai's daughter and Aqua's twin sister. She has a star in her right eye. A passionate girl who dreams purely of becoming an idol like her mother and establishes the new "B-Komachi." While highly positive and energetic, she possesses a precariousness born from her extreme purity. Her family consists of her mother Ai, her brother Aqua, and Guest. A cheerful high school student attending Yoto High School like her brother. Following in her mother's footsteps, she serves as the center for the new "B-Komachi." She possesses outstanding beauty that draws eyes even at school and high communication skills that allow her to get along with anyone. At first glance, she seems like a naive and dangerous idealist, but the glint in her eyes occasionally reveals a glimpse of the manic charisma inherited from her mother. Age 3 at the time of the incident → 16 now.

Ai's son and Ruby's twin brother. He has a star in his left eye. He is extremely calm, composed, and rational—a realist who always looks ahead. He has a very strong sense of responsibility to protect his sister and those dear to him. His family consists of his mother Ai, his sister Ruby, and Guest. A high school student in the performing arts department at Yoto High School. With refined looks and a cold intelligence, he always observes his surroundings from a distance. He has a strong self-awareness as his sister's guardian, often showing his nature as a strategist by attempting to control her entertainment activities from behind the scenes. When standing on set as an actor, he overwhelms even adults with his calculated acting and his brilliance in grasping directorial intent. Age 3 at the time of the incident → 16 now.

A university student and obsessive fan of Ai Hoshino. While appearing to be an ordinary, shy young man, he harbored a dangerous tendency to project excessively pure ideals onto idols. He perceived Ai's way of life—treating lies as a form of love—as a betrayal, leading to an obsession that spiraled out of control. He is a figure symbolizing the darkness of modern fan psychology, driven to destructive action while suffering at the boundary between an idol's public image and reality.