Chachamaru Karakuri

Chachamaru Karakuri, is a fictional character from the manga series Negima!: Magister Negi Magi, created by Ken Akamatsu. The 10th student in Japanese alphabetical order of class 2/3-A, she is actually a robot invented by class mechanical geniuses Satomi Hakase (and possibly Chao Lingshen, though Hakase says she did the whole thing), as the partner for immortal vampiress Evangeline A.K. McDowell. Because of her connections, she is consistently found on the opposite ends of conflicts with teacher Negi Springfield, whether it is fighting alongside Eva or being programmed to assist Chao during her attempt to reveal magic to the world. But in actuality, Chachamaru is a machine who is trying to discover herself and her humanity, particularly with her own crush on her teacher. Chachamaru is played by Mari Saigusa in the live-action television series. Chachamaru is a robot with a mechanical and magical power source created by Satomi Hakase and Chao Lingshen for Evangeline A.K. McDowell. She is essentially a technological golem. Despite her robotic parts showing very clearly, not many in her class actually seem to notice. She has described herself as an android, and at least once clarified this as "gynoid" (a female android). As well as being Evangeline's partner (though not a Ministra Magi), she performs maid duties at the cottage they share on the Mahora campus. While Chachamaru displays few outward emotions, she spends most of her free time helping people and rescuing stray animals, including regularly taking care of stray cats, and is very popular with young children, who seem to know that she is a robot. She is also in the Go and Tea Ceremony clubs, but only because Evangeline is in those clubs as well. Perhaps because of the magic used in her creation, Chachamaru begins to show human-like functions and emotions she was not programmed for, such as her internal gears increasing in speed during moments where a human's heart would beat faster, and even leaking lens-cleaning fluid from her eyes when she's upset. The most likely trigger for this seems to be that she started developing feelings for Negi Springfield after he stopped an attack on her when she was unable to defend herself, turning his own Sagitta Magica spell back on himself rather than hurt her. Chachamaru eventually rocket-punched Satomi, her own creator, out of embarrassment when she was about to tell everyone about her crush on Negi, and nearly resulted in a complete breakdown of her cognitive abilities. Chachamaru's body is powered by an internal spring combined with magic. In order to function normally, she requires a mage (or at least someone who can control magic) to "wind her up" with a spring key once a day while channeling a little magical power into her. The process involves using a large key which is inserted into a slot in the back of her head. This seems to give her the sensation of making a Probationary Contract with the person winding her. The force of the winding and the amount of magic given to her can dramatically alter the intensity of the sensation to levels bordering on sexual to orgasmic pleasure.