Tamie Idogawa (井戸川 民絵, Idogawa Tamie) is Kugimiya Masami's dance partner. She is a woman of few words but immense skill. Not much has been revealed about her character, but she seems to be stoic and calm under even strenuous circumstances.
According to the fanbook, she weighs 52 kg. She was born in Hokkaido, and she began dancing at age 6.