Mai Ootsuka

Mai has been class representative for nine years straight, functioning in this capacity when Hanai is absent or unable to perform his duties. Unlike him however, she has trouble commanding her classmates' attention. Mai has freckles, is hyperactive, and likes fairy tales (though she denies it herself). According to the "ero society" data, she hides a fair-sized bust for some reason. She also likes mahou shoujo, and often imagines herself as the central character of her own show. Mai has known Nishimoto since kindergarten, and disapproves of his unabashed interest in porn. Her name is quite a pun to Ai Otsuka, a japanese pop idol.

(Source: Wikipedia)