Mutou, Tamaki

武藤環

She is a university student residing in the same building as Shinkurō. She can be characterized as highly flirtatious, with her advances toward Shinkurō being noticeably more aggressive. She claims to be very knowledgeable about the ways of love, though she excludes her own experiences, as she struggles to keep a boyfriend. She has grown fond of Murasaki and teaches her various perverted terms, much to Shinkurō's objections. Tamaki is an instructor at a karate dojo and is very formidable in combat, with notable feats such as stopping a punch with just two fingers and holding her own against Yūno at full strength.
In the anime, she is simply a normal university student seeking love who also possesses fighting skills.