Honoka Sugiura

Mirai's adoptive sister; he was taken in by her family when they were young after his parents died. She's very attached to Mirai, and begins to worry when she realizes he's at the age where he might want a girlfriend. When she discovers Mirai has a crush on a classmate she tries to be supportive, but her true feelings force her to interfere. (Only appears in the Dakishimetai!! and Help! stories.)