Yoshino Koiwai

Yoshino Koiwai is one of the main characters and the main reason for Masamune Makabe's transformation and the servant of Aki Adagaki. She wanted to apologize to Masamune Makabe 8 years ago, hence why she's secretly aiding him. Yoshino has short, light brown hair with a small braid to the side and two cream colored adornments clipped on opposing sides in her hair, whilst her eyes are also brown. She is seen at school wearing the school uniform which consists of a black jacket which has four buttons at the bottom that have the school's crest, a pink shirt, a plaid peach skirt, and blue and yellow-striped bow. Her school uniform has a hoodie. Generally around people, Yoshino acts shy and soft-spoken. However, she is revealed to be very mean towards Masamune Makabe. When ordered by Aki, she does as she's told. Yoshino is able to hide her emotions and act perfectly fine, which is an advantage as she is helping Masamune - the "enemy" of her mistress - in getting revenge.