Melon is a female robot who showed up in Faye and Bubbles' new shop, Union Robotics, along with Arthur. She has a detachable ass, which was apparently lost in orbit for unexplained reasons. She paid for the shop's services in constructing a new ass for her, making her their first customer. She has melon-green hair and pink eyes.
After the detachable ass story, Melon appeared in the background in strip.
Melon likes to wander around. She entered Steve's house through a tunnel in basement and had breakfast with him. Melon lives in the same building as Elliot and once wandered into his apartment because she ignored apartment numbers, considering them as "abstract concepts".
Melon lives with Arthur and works in some kind of performance which involves various critters. Melon has not got tired of this job yet. She is friends with Roko, and once came to sit on her couch and discuss Roko's bread fetish. Melon joins Arthur, PT410x, Gordon, and other robots on poker nights. Same as Bubbles, Melon smells drinks, but prefers much stronger smells of various chemicals to teas.
During Roko's body crushing incident Melon was trying to be supportive. She sang songs out of tune to the mainframe, which simulated the virtual environment Roko was temporary placed in. Melon also met Roko at Bodyhub when she has acquired her new Model G body.. And she kept an eye on Roko at her apartment during her first days in new body.