Fuuko Ibuki

Fuko is a first year student at Tomoya's school (Technically, her age is same as Tomoya's), but she is always alone by herself, making wood carvings of starfish with a small knife to give to others as presents for her sister's upcoming wedding. Whenever Fuko sees something she thinks is incredibly cute she completely loses awareness of her surroundings, which Tomoya takes advantage of by playing a variety of pranks on her.