【OSHI NO KO】 — Characters & Cast

Exposing and destroying his biological father to avenge Ai.

Reincarnated with memories of his past life as Dr. Gorou Amamiya, Aqua begins as a devoted son and prodigy before being defined by Ai’s murder. He represses his natural passion for acting, utilizing the entertainment industry solely as a hunting ground. Across the 2.5D Stage Play and Movie arcs, his psychological armor fractures under severe panic attacks and survivor's guilt, forcing him to choose between saving others and self-annihilation.

Emulating Ai to perform at the Tokyo Dome, which evolves into uncovering truth through stardom.

Born from the reincarnated soul of Sarina Tendouji, Ruby starts as an exuberant, pure-hearted girl determined to dance on the stages her frail past body never allowed. As the story progresses and she uncovers the truth behind Gorou’s murder, her innocence darkens; she adopts her mother's star-eyed manipulative charm, weaponizing lies to climb the industry hierarchy before reclaiming her authentic joy.

Regaining relevance as an authentic actress and earning Aqua's genuine recognition.

Introduced as an arrogant child actress ("the genius who can cry on cue in ten seconds"), Kana suffers early career burnout and adapts by making herself unthreatening to directors. Rejoining Aqua in high school and fronting the revived B-Komachi, she wrestles with low self-esteem, eventually unlearning self-suppression to emerge as a powerhouse actress and idol center.

Supporting Aqua and achieving peer recognition as a dramatic artist.

A theatrical talent with the Lala Lai Theatrical Company, Akane joins a reality dating show where cyberbullying pushes her to the brink. Rescued by Aqua, she uses psychological profiling to construct a recreation of Ai Hoshino. As she discovers Aqua’s revenge plot, she transitions from a protected victim to an ally willing to navigate moral grey zones.

Finding a way to give and experience genuine love through her idol persona.

An orphaned teenager scouted into pop idol group B-Komachi, Ai views herself as broken and incapable of genuine love. She builds a career on curated smiles until motherhood brings a gradual, terrified awakening of real emotion, culminating in her final realization moments before death.