Cassie is a young girl with short, brown hair in pigtails. She's wearing a red long-sleeve shirt, blue and white shorts, and black leggings. Her shoes are a pair of white light-up sneakers, with red and purple lights on the sides, and she wears a pair of white socks with them. Cassie is initially portrayed as slightly impatient, annoyed at Gregory asking to meet him at the Pizzaplex and not showing up. Once Gregory tells her what happened, however, her attitude quickly shifts to caring.