Nanny was a creation of Magneto. She was programmed to care for the X-Men after Magneto used computerized chairs to impair their nervous systems, reducing them to an infantile state. She possessed no other offensive abilities or functions, serving merely as a tool of psychological torture to Magneto's enemies. The robot is nauseatingly patronizing. Cyclops compares her voice to "a marshmallow soaked in honey". Storm, even in her infantile state, was able to pick her chair's lock, and facilitate an escape. Nanny was then destroyed by the X-Men during their escape, and her remnants were used to lure Magneto out into the open. Later, when the X-Men return to Magneto's abandoned base, they discover Nanny's head. Nightcrawler makes a joking reference to Hamlet, and Wolverine destroys the head with his claws.
Years later, a rebuilt Nanny possessing highly advanced technological weaponry captured the X-Men, but was stopped by a former girlfriend of Beast named Trish Tilby. Tilby, being a mere human, was undetectable to the robot. This allowed her to get close to Nanny, and destroy her.
Earth 295 - Age of Apocalypse
An alternate reality version of Nanny appears in the Age Of Apocalypse storyline. This Nanny was a bodyguard and caregiver of Charles Lehnsherr, the son of Magneto and Rogue. She was equipped with retractable offensive weaponry, and a defensive capability enabling her to cocoon herself around young Charles. Her only function was to defend the child, she covered the child with a omniun cocoon but she was destroyed while performing this task, failing to prevent Charles' abducton by the agents of mutant despot Apocalypse.
X-men: Battle of the Atom
Nanny is featured in the mobile card game "X-Men: Battle of the Atom" based on the comic book story with the same name. Her cards are: