Mashiro Mitsumine

Age: 9

Hakuya's younger sister, who somehow manages to enroll in Kobeni's class. She often tries to vocalize that she isn't a child, but her honest feelings over her likes and dislikes are often read easily by the others. She is quite fearful of Benio but is easily swayed by sweet things.

[Spoiler] She utilizes her magic to do certain things, such as cheating on a test just enough to not have to do makeup test. And she also utilized it to attend the same school as Hakuya and Kobeni despite being a few years younger and much smaller than the average high school student.

It was later on revealed that she is an animal spirit who has taken a human form. [/Spoiler]