Rei Ichidou - 一堂零

Kimengumi leader and protagonist of the series. Nickname: Mayunashi no Rei (まゆなしの零, No-Eyebrows Rei). His family runs a toy store, he lives with his father and younger sister (his mother has already died). Considered a "High Class Buffoon", he retains the same simple-mindedness he had as a child and is quite the hentai (as in "weirdo" rather than "pervert"). It took him three tries to pass the high school entry exam. (Source: Wikipedia)