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.