Fuyumi Todoroki (轟とどろき冬ふゆ美み, Todoroki Fuyumi?) is the older sister of Shoto and Natsuo, the younger sister of Toya, and the only daughter of Enji and Rei Todoroki.[3] She was also a teacher at an unnamed elementary school.

Fuyumi is a young woman of average height with turquoise eyes (gray in the anime). She has white hair, flecked with a few noticeable traces of a crimson-like color, which is mostly shoulder-length aside from the ear-length side bangs she sports and the short clump she leaves hanging down her forehead.

She wears a white dress shirt with a plain grayish peach-colored cardigan, the sleeves worn rolled up to just below her elbows, along with navy blue jeans. She also sports brown dress shoes and a pair of red-framed rectangular glasses.

During the Final War, Fuyumi receives burn marks and scars right after exposing herself to the battle between Dabi and Endeavor. In the aftermath of the war, Fuyumi's burns have mostly healed, with only three notable scars remaining on her face. Her hair has also been cut, with it now reaching her chin.

Fuyumi is a kind-hearted person who cares deeply for her family. She took on a nurturing role for her younger brother, Shoto, during their mother, Rei's absence. It is shown that she has an amicable relationship with both her brothers, Shoto and Natsuo, as well as her mother whom she often visits at her hospital ward. She also has a teasing side, as she taunted Natsuo for having a secret girlfriend at college.