Corpse Witch is a female robot that was manager (according to Bubbles) of an underground robot-fighting ring where Faye and Bubbles once worked.[1] Her first appearance is in strip 3007.

According to Jeph's twitter account, the name was initially meant as a joke.[2]

Despite her position, she seems very concerned with the safety of the robot fighters.[3]

Her speech patterns are formal and erudite, much like Bubbles'.[3]

In strips 3160 and 3177, Corpse Witch pushes Bubbles to stay away from humans and stay isolated at the robot-fighting ring. Some time later, Bubbles was the subject of robot bigotry, which involved some teenagers making comments that she overheard. She became enraged and stormed back to the fighting ring, where Corpse Witch seemed vindicated in her distrust towards humans. However, when her attempts to persuade Faye to avoid the angry Bubbles, Faye's willingness to risk her safety to comfort the angry AI seemed to surprise Ms. Witch.

It's revealed in 3377 that Corpse Witch performed a procedure on Bubbles to partition off memories that were causing Bubbles PTSD, but after the procedure Bubbles was forced into servitude if she ever wanted the decryption key so she could regain access to the memories. Station is unable to help, but Spookybot arrives and is able to break the decryption.[4] It's quickly revealed that Corpse Witch deleted the memories in question (apparently by accident[5]). Spookybot proceeds to shut down the fighting ring and turn Corpse Witch in to the authorities.