Rex has blonde, spiky hair that is always messy and is often seen in a little ponytail. He has fair skin, with patches of blank space, like on his hands and torso. He wears a white shirt covered by a purple and black jacket, with black pants and grey shorts over them, as well as purple sneakers and black-and-white gloves. His mask is a hard, full-face purple mask with three crosses on it. The bottom has teeth and opens his mouth so he can eat. Rex has purple eyes.