Judy is a homemaker and baker, the wife of Hugh Neutron and the mother of Jimmy Neutron.
Judy is a tall and skinny 1950's housewife style pale-skinned woman with light brown hair that is styled in a 50's flip hairstyle with square bangs split on the middle, green eyes with pale green eye shadow and she has a beauty mark on the left side of her face.
She wears a green sleeveless dress with small pink polka dots and green high-heel dress shoes. She also wears large gold hoop earrings and a white pearl necklace along with light pink lipstick. Her nails are polished with pink nail polish.
Judy is a caring and loving mother towards Jimmy Neutron and she is very affectionate towards her husband, Hugh Neutron. However, she gets frustrated with Jimmy's antics and all the trouble he causes, usually having to give him a lecture or put him in his place. For example, At one point, we find out that Judy has asked Jimmy to pick up his pants 54 separate times, but to no avail. She often makes Jimmy do chores before performing an experiment or going to space. This usually causes Jimmy to find creative ways around his chores, leading to much bigger problems, such as the invention of Jimmy's clones and the Maternotron.
Sometimes, it is hinted that Jimmy might have gotten his super intelligence from his mother. One example of this occurs in See Jimmy Run where she scientifically/correctly points out a flaw in Jimmy’s fast running shoes that he hadn't considered. Another example takes place where she impresses Jimmy by pulling a highly advanced molecular blasting ray out of her utility closet to shut down the Maternotron. She also put a tracking device in Hugh's skin, to make sure he stays safe. Additionally, Judy is the family mechanic as she can often be found in the garage, checking the plugs and points or adding horsepower to the family roadster.
She was obsessed with cleaning and is a bit of a germophobe that she goes through great lengths to ensure that the Neutron household remains clean, including dusting the lawn. She admits that she wanted to throw Sheen's Ultra Lord away after seeing how filthy it was, but couldn't because she didn't have her rubber gloves.
She loves cooking and baking, especially pies. She often makes fresh pies for Hugh, much to his delight. At one point, Judy begins panicking when Hugh rejects one of her pies, theorizing that he may now be into cakes or tarts now. She often uses unusual ingredients such as when she makes a bramble-berry pie for the Wheezer family.