Voiced by: Iguchi Yuka (Anime) & Toyosaki Aki (Drama CD)
Rinna is one of Yūki's assistants. Despite being an assistant, Rinna knows nothing about drawing manga, as she applied to the recruitment and Mihari hired her due to Yūki wanting someone who is cute. She greatly admires Yūki and his work, being one of his fans. She's easy going and is generally cheerful, playing along with hiss weird perverted ideas. Rinna is 18 years old.