Chisa Tsukamoto

Chisa Tsukamoto is the daughter of the printing shop where Kazuki gets his dōjinshi printed. She is hardworking and looks after the business when her parents go out of town, but she is clumsy and scatterbrained and sometimes makes mistakes with the printing process. She is often seen chasing a runaway cart. In the anime, she's a junior student at Kazuki's school. (Source: Wikipedia)