Watatsuki no Yorihime is a Lunarian princess, who along with her sister Yorihime is charge of the Lunarian Defense Corps; Yorihime is primarily responsible for training the moon rabbits. Yorihime stands 188cm tall and weighs 652kg, being morbidly obese. She is a serious, a strict supervisor and urges her trainees to do their best. 

Yorihime used to be a superb swordfighter before she let herself go. She is in denial about her eating disorder, even if she is caught in the act.