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. 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, determined to fulfill her mother's dreams, she reformed Ai's idol group with the support of her friends.