Raimu is a teenage girl of an average build and height. She has long and wavy dark blue hair and lilac-blue eyes. She is often seen having makeup and depicted in the standard Kitauji High School uniform for female third-year students.
- The initials on Raimu's lucky charm were "L.O." instead of "R.O"
- She performed the first alto saxophone solo in Takarajima (Season 2, Episode 7)