Deuteragonist and one of the titular characters of [[Oshi no Ko]]. She is the [[mother and daughter|daughter]] of [[Hoshino Ai (oshi no ko)|]] and the [[twins|twin]] [[brother and sister|sister]] of [[Hoshino Aquamarine]]. Founder of the new [[B-Komachi (new)|]].

She has [[pink eyes]] with [[star-shaped pupils]] and [[long hair|long]] [[blonde hair]] stylized with a [[one side up]], [[hair between eyes]], [[swept bangs]], and [[sidelocks]].

She is voiced by Igoma Yurie.
星野ルビー 星野瑠美衣