Aloe Cookie/OvenBreak

Aloe Cookie was originally an NPC that appeared within the story of AI Run: Cyborg Menace. Two years later, she became playable on May 17th, 2021, to celebrate the anniversary of the event. She is a green-haired scientist with a seemingly prosthetic right leg and a scouter over one eye.

Aloe Cookie is a very determined and intelligent scientist, having made Ion Cookie Robot as well as saving Cyborg Cookie's life, though this was at the cost of Cyborg Cookie's entire body, presumably after the latter was gravely injured.

Unfortunately, Cyborg Cookie does not remember what Aloe Cookie did initially, and violently tries to escape and destroy the Cookie's lab with the assistance of Ion Cookie Robot, who is also defecting. Finishing the event will restore Cyborg Cookie's memories, and the two will become friends again once Cyborg Cookie realizes what has been going on and what Aloe Cookie actually did.

Trivia

 * Aloe Cookie was the first fully story-related NPC Cookie, not even having in-game non-story sprites at the time of initial release.