Ryuuko Mifune

Age: 15-16
Height: 150 cm

Mifune is Makoto's classmate who is quite friendly with him. Due to the kanji in her name, she is often nicknamed Ryuushi, which she doesn't particularly like. She is vegetarian, referring to herself as a "fruitist" (fruitarian). She plays on the school's basketball team and has an energetic personality.

It is hinted that she has feelings for Niwa.
(Source: Wikipedia)