Madelyn is a young teenaged girl. She looks similar to her big sister except she wears bigger, frameless glasses, with a purple tint; is a bit shorter; and has brown hair in bunches. Her outfit consists of a pink dress, a white long-sleeve button-up shirt, purple leggings, and pink formal shoes.

Madelyn is the opposite of her big sister, Madelyn seems more extroverted, while Velma is more introverted. Velma and Madelyn love each other more than anything and are very protective of one another.