Also known as: 星野ルビー, 星野瑠美衣
Deuteragonist and one of the titular characters of Oshi No Ko. She is the daughter of Hoshino Ai and the twin sister of Hoshino Aquamarine. Founder of the new B-Komachi (New).
She has Pink Eyes with a star-shaped pupil in her left eye and long Blonde Hair stylized with a One Side Up, Hair Between Eyes, Swept Bangs, and Sidelocks.
She is voiced by Igoma Yurie.