Zero

An android maid who serves Pao, Ai, and Mako. She follows the code of "Intergalactic Maid Law," which has rules such as allowing maids one day off a year. She is the strongest fighter the aliens have and battles Ichigo several times. She eventually switches sides to the GRA after falling in love with Cosmic Banchou. She was built by Sanada and has a "Maiden Chip" within her that reacts to Ichiro's presence. While an android, the Maiden Chip allows her to feel love and she actively pursues Ichiro's attention several times. According to the OVA, she is successful, as Sanada gives her permission to marry Ichiro after he becomes (unknowingly) engaged to her by accepting the gift of a rose.