Bubble wears a black overall dress with a white polo shirt underneath. Additionally, she has a black wristband on her left wrist, white socks and black shoes. She has no facial features other than her eyes, which are green with star-shaped pupils. Her hair resembles soap bubbles, with a yellow duck and blue toothbrush on the top of her head. She has a fluffy white tail, and bubble-like particles float around her head and tail. Bubble is very kind and very popular in class.