Birthday: September 2 Zodiac sign: Virgo Class: 1-5 Anna's best friend and very protective of her. She claims to be in love with Anna. Looks moe but actually has an aggressive attitude and hates males. She has a 25-year-old brother Masaomi who already moved out and is also married. In chapter 20, Mattsun tells first her brother and then her his true feelings and she then believes him.