Yutori Takamagahara is one of the Butei Masters, who is the Head of the Inquesta department. Currently, she is the homeroom teacher for Aria, Kinji, Riko, Gouki, and Watson. She appears to be friends with Ranbyou and Umeko Tsuzuri.
Takamagahara is a tall, attractive, young woman with long long brown hair, large breasts, round hips, and wears glasses. According to Kinji, she wears clothing that makes her look like the slender type.
Takamagahara is the most "normal" of Butei Academy's teachers. Usually, she is calm and cheerful, but when angered, as shown when Reki talked back to Headmaster Takeru Midorimatsu, she can give off a killing intent. However, she can feel fear like when the Headmaster uses his undetectable transparent abilities. Also, according to Kinji, she is still not a normal person due to being able to be in the same room as Ranbyou and Tsuzuri and come out unharmed everyday. In addition, seems to have flirtation side, especially to Kinji, in the way she winks at him and calls him handsome.
Before becoming a teacher at Tokyo Butei High School, Takamagahara was a feared mercenary known as "Bloody Yutori." However, after being hit by a sniper bullet to the head, she was unable to fight anymore.
- Her last name translates as "The High Plain of Heaven", the dwelling place of the gods in Japanese/Shinto Mythology.
- Takamagahara is the only Masters to date who almost caused Kinji to enter Hysteria Mode during the Water-Kisbasen in the Sports Festival.