Kuragano Hitoha

The eldest of the Kuragano family and is also the mother figure.

She is a quiet, gentle, and cheerful person who is popular at the school as a nurse teacher. She became a nurse's teacher so that she could properly watch her younger brother (the protagonist) grow up.
At the school, she calls her brother to the infirmary after HR in the morning to check on his condition. She is also a licensed nutritionist and a good cook.

She is shocked to see that the protagonist's height is slightly lower than the average, so she has a family meeting and decides to breastfeed the protagonist.

"Oh... you don't look well, are you okay?. Do you want to drink milk from your sister's tits?"