Ruby Hoshino

Ruby Hoshino is a passionate and determined young woman who dreams of becoming a famous idol, following in the footsteps of her mother, Ai Hoshino. Although she was born into extraordinary circumstances, being the daughter of a renowned idol, her childhood was marked by the tragedy of her mother's murder, an event that deeply affected her life. In her past life, Ruby was Sarina Tendouji, a girl suffering from a terminal illness. During her time in the hospital, Sarina developed a deep admiration for idols, especially Ai, whom she saw as a source of joy and hope. This dream of living a life full of light materialized when she was reincarnated as Ai's daughter.

Ruby grew up under the care of Miyako Saitou and alongside her twin brother, Aquamarine Hoshino, with whom she has a complex relationship. While Aqua is driven by a desire for revenge, Ruby channels her energy into her idol career, seeking to revive the group "B-Komachi" and honor her mother's legacy. Ruby possesses a great natural talent for singing and dancing, inherited from Ai, and uses her charisma and enthusiasm to excel in the world of show business. Despite her energetic and optimistic personality, Ruby also deals with the traumas of her past and the pain of losing her mother.