Unit 47

Unit 47 is a female Robot who collaborated with Professor Farnsworth as a chemist working to create a virus that would destroy an infestation of posies in his youth and became his robosexual lover.

Leaving the Professor
Unit 47 eventually left the Professor for another Robot after 43 years together. These events left him loathing the idea of robosexuality, leading to his objection against Proposition ∞ in July 3010. Farnsworth claimed, for many years, that it was the departure of a female Human named Eunis what turned him against robosexuality, but he finally admitted that she was in fact a Robot during the debate led by George Takei's head.

Trivia

 * Her name is either a reference to, the Star Wars character , or the Star Trek  (or is it just random).
 * As revealed on the commentary to "Proposition Infinity", the human appearance of Unit 47 is based on director Crystal Chesney-Thompson. The script said to make her nerdy but still very cute and beautiful, and they immediately decided to base her on Crystal.
 * At this time robots of the modern era were not created so she could not exist