Misaki, Aya

三咲綾

Aya is a classmate of Mariko and Nanako. As the daughter of a renowned lawyer, she desperately wants to join the Sorority, just as her mother did in her youth. Nanako is the primary target of Aya's malice and cruel comments, since Aya believes Nanako is entirely undeserving of Sorority membership. Later on, Mariko, who has always been her rival, becomes her main target.
She is accompanied by two friends, Furuta and Sonobe, who support and follow her nearly everywhere.
Her character is portrayed more fully in the anime adaptation, which reveals details of her background and certain concealed traits of her personality and conduct, such as her sweetness and loneliness. (from http://members.tripod.com/~aoisora)