Akira Kiyose (清瀬明良), performing as KIKUNOYU, is a Tokyo-born high school student starting at 16 and turning 17. He stands 172 cm tall, weighs 57 kg, and has blood type O. His birthday is July 2nd places him under the Cancer zodiac sign.

Driven by a strong passion for singing, he gained attention publishing performances online as KIKUNOYU. This led to his recruitment by sMiLea Production, the talent agency founded by the retired legendary idol duo Anela to nurture new talent. Within sMiLea, he formed the idol group Protostar alongside Banri Naoe and Chihiro Isuzugawa, frequently performing in the center position. His journey traces a path from anonymous online singer to professional idol, navigating the industry challenges and dynamics within sMiLea Production, home to other groups like Legit and Jaxx/Jaxx who inspire Protostar.

Personally, he enjoys watching superhero anime. His name reflects his character: "Akira" combines "bright/light/clear" (明) and "good/virtuous/respectable" (良), while "Kiyose" derives from "clear/pure/clean" (清) and "swift current/rapids" (瀬).

His story continues into the second season, where the 17-year-old remains active in Protostar as the group strives to advance within the competitive idol landscape.