Ritsu

Ritsu (律, Ritsu), full name Autonomously Thinking Fixed Artillery (自律思考固定砲台, Jiritsu shikō kotei hōdai), is a student in Korosensei's class 3-E of Kunugigaoka Junior High School, an AI and the first of two official transfer students of class 3-E.

Appearance
Originally Ritsu was just a head, however, after Korosensei modifitied her body, her full appearance was shown, soon she goes around peoples phones, her outfits seem to change but her most common one is the winter uniform.

Personality
Ritsu did not have any personality original, she acted just like a a robot. After Korosenseis' remodeling, she seemed to gain a happy cheery personality.

Quotes

 * The killing probability of the next shot is less than 0.001%. The killing probability of the shot after that is less than 0.003%. The probability that I'll be able to kill you by graduation is more than 90%.