Mutsumi Yozakura

The heroine of this work, born on June 6th. A girl who is Taiyo's childhood friend and also a classmate. She is enrolled in class 2-C, with the attendance number 16. She is the sixth child (third daughter) of the spy family, the Yozakura family, and also the 10th head of the family. She is 163cm tall and has type A blood. The white hair on the left side of her long hair is due to stress from an accident in her childhood. However, she is not good at singing, and although she has some self-defense skills, she has no combat ability.

She has been associated with Taiyo since elementary school and has always been concerned about Taiyo, who lost his parents and was feeling down. She is troubled by the abnormal sister complex of her eldest brother, Kyoichiro, and married Taiyo (in a common-law marriage) at the suggestion of Futaba, after Taiyo caught Kyoichiro's attention. Since then, they have been living happily together in high school, known as a loving couple.

In episode 170, five years have passed, and she has become 22 years old, having children with Taiyo and becoming a mother of two.