Otoha Takanashi is a 14-year-old girl in 8th grade with a Feminine-type style. She is a member of Edel Rose, the rival team that confronts Prism Stone. Otoha is a very quiet, timid girl who often gets scared of getting scolded by Bell and apologizes for her actions. She can also have a strong personality when she faces scary situations. She can smell the "scent" of music.

She became friends with the Prism Stone girls after a feud with Bell, but returned and formed a Prism Unit with Bell and Wakana called Bell Rose.