Ruby Hoshino

Ruby Hoshino, more commonly referred to as just Ruby, is the female protagonist and one of the titular characters of Oshi no Ko. In her previous life, she was known as Sarina Tendouji, a terminally ill patient who was cared for by Gorou Amamiya and, following her death, was reincarnated as the child of her favorite idol, Ai Hoshino. Neglected by her parents in her previous life and being a fan of Ai, she greatly enjoyed her new life, with her new mother teaching her how to be an idol from an early age. Unfortunately, this happy life ended when Ai was murdered by a deranged fan. Afterward, dete...

Ruby is the daughter of her favorite idol, Ai Hoshino, and she is determined to live her life to the fullest as she was a frail girl who could barely walk a few steps without stumbling in her past life. Overwhelmed with joy, Ruby has given herself the goal of becoming an idol singer, not only to fol...