Sayaka Itomi is a first-year student in the middle division of Renpu Girls' School.

She is a 12-year old girl with short white hair and ruby eyes. She is often seen wearing the uniform of Renpu Girls' School.

Sayaka is a young genius Toji. She handles her duties with ease, but she has a hard time communicating with the people around her. Although seemingly stoic, her eagerness to accomplish something reflects in her emotions; among the things she feels bad about is failing to fulfill whatever mission is given to her.