丹下 花純

A hardworking girl who works to support her siblings. While she is the protagonist's kouhai at school, she is his senpai at the shop they work at. Because their parents' company went bankrupt while leaving huge debts, they ran away, leaving Kasumi and her siblings in a life of poverty. Serious but very kind, Kasumi wants to bring her siblings up to become talented individuals, which she secretly vowed with that in her mind. Because she is living a life of conservation, Kasumi has a tendency to do whatever it takes to use the least amount of money to solve their problems.

"Though it's not a shameful thing, I'm not particularly proud to be poor."