Yuki Horiguchi

A girl who knows about Ozu Takahiro's kindergarten dream of wanting to orbit the world with a long jump. She can get jealous whenever she sees Ozu 'plays' with other people besides her and always do everything she can to draw him back. She always wears headphones which blares music into her ears to black out the sounds of the surrounding world thereby giving her a safe refuge in her own world. She is completely helpless without the headphones. She has long painted fingernails which uses to "cat scratch" anyone who annoys her. She has low alcohol tolerance and a small drink would get her drunk, a state in which she does all sorts of crazy things. She also frequently pouts and assaults Ozu. (Source: Wikipedia with a little editing for spoiler free)