Jenny stands at 6.5 feet (1.98 m) tall and weighs roughly 600 lbs.She has blue ears/pigtails, with bolts connecting from her head to her ears/pigtails, blue hair, white skin, blue 'clothes', a 'dripping tray', she has a tank top and a miniskirt, a belly bolt (a bolt that simulates a belly button), feet that mix with the shoes, arms with lines in the middle, hands with 4 fingers that have holes in the center, no ears, and a "false nose".
Thanks to having high Artificial Intelligence or "AI",Jenny's personality is that of the eager young teenager, one who desires a sense of freedom, but also wants acceptance from her peers. She likes anything pertaining to teenage activities, but hates it when her mother or her duties get in her way of her enjoyment. Unfortunately, she is easily trusting of others and, as a result, can be quite naive. The Krust Cousins, Brit and Tiff, have often taken advantage of Jenny's kind and trusting nature.