Ru-Mi Yeo

Shimura's classmate and a beauty YouTuber. Collaborated with Hamaken in videos and was a bystander to the bullying of Shimura, but as the popularity of self-taught fighting increased, she wished to collaborate with Shimura. She is liked by Michinari, but Rumi herself is attracted to Shimura's kindness.

Shimura thought she was a rich young lady, but in reality, she lives alone in a small apartment and doesn't even know her parents' faces. To counter the revelations made by Sayuki, she revealed her true background on YouTube.