Chachamaru Karakuri is a supporting character in the anime and manga series Mahou Sensei Negima! (Negima! Magister Negi Magi). She is an android created by Satomi Hakase and serves as the loyal assistant and protector of Evangeline A.K. McDowell. Despite her robotic origins, Chachamaru develops a gentle, kind personality and forms meaningful friendships with her classmates. Her role in the series often involves comedic misunderstandings about human emotions, but she is also a formidable fighter who assists Negi and his friends during battles.