Riko Hinakura is one of sixteen main characters affiliated with voice talent agency AiRBLUE and assigned to the unit Wind. Her interest in voice acting sparked after hearing about the profession during a radio broadcast while working part-time jobs. She maintains a good-natured, straightforward demeanor, treating others frankly and earning deep trust from her unit peers. Her personality shows strong drive and a tendency to act before thinking situations through thoroughly.

During group activities, such as assisting with a move, she demonstrates leadership by organizing logistics, delegating tasks, and motivating peers like Miharu Yomine, Aya Kamuro, and Mahoro Miyaji. Facing obstacles like a lack of elevators or Miharu's sprained ankle, she remains pragmatic, adjusting plans, prioritizing safety, and maintaining team morale. She encourages collective effort, acknowledging contributions and emphasizing that challenging tasks demand teamwork over individual exertion.

Physically, she stands 160 cm tall with blonde hair and golden eyes. Her birthday is September 28, and she has blood type O. Her name carries specific meanings: "Riko" combines "ri" (莉, "white jasmine") and "ko" (子, "child"), while "Hinakura" derives from "hi" (日, "sun/day"), "na" (名, "reputation"), and "kura" (倉, "warehouse" or "storehouse").