Hinako Kakei

Hii-chan is the best friend of Asahi's sister, Tsukiko. She's a cheerful gyaru with a weird sense of personal space (at least when Asahi is concerned). Tsukiko chose her as a friend on account of her good looks, in line with her obsession with physical beauty. Hii-chan is shown to be easily jealous of girls that spend time with Asahi, especially in his grade. She's studying ancient Japanese literature in college.