Yayoi is a kind-hearted girl who is very sheltered. She is confined to a wheelchair and relies on her close and dearest friend Kanako for support. She also appears to be the only person who Kanako does not resent.

Yayoi is the story-teller in the storytelling parody vignettes in the anime. She quietly begins to tell her tale and often ends by beginning to say something stupid, which is promptly cut off.

She plays the piano well.