Monomi (previously known as Usami), is one of the teachers on Jabberwock Island, and also considers herself a magical girl. She has unending optimism, being designed to constantly lift the spirits of all of her students. Despite being easily frightened and intimidated, she stands up to protect those she cares about again and again, albeit with varying degrees of success. Throughout Danganronpa 2, most of the students treat her as an enemy, or some sort of joke, due to her visual similarities to Monokuma, and lack of ability to rescue them. However, by the end of the game, they find a surprising bond with her.

Monomi's voice is quite high pitched, though not as much as some of the other females in the cast. It also has a lot of bounce and energy to it, constantly filled with positivity.