Rumi Usagiyama is a young Pro Hero. She first appears in chapter 184 of the manga and made her first full appearance in episode 87 of the anime.

Rumi presents herself as a tomboyish, hotheaded, and hyperactive but headstrong hero with a strong quirk to boot! She is primarily a close-range Combatant using a number of MMA style attacks. She is currently the #5 ranked hero across Japan.