Ritsu

The Autonomously Fixed Thinking Artillery (自律的に固定観念砲兵, Jiritsu-teki ni kotei kannen hōhei), or Ritsu (律, Ritsu) 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.

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%.