Jax appears to be a purple-colored cartoon rabbit whose design evokes the look of early cartoon characters, also known as "rubber hose" characters. He has long purple ears on top of his head, and his overall build is tall and slender. Jax has black eyes with square pupils, and his sclera and teeth are both yellow. Jax wears fuchsia-colored overalls and yellow gloves. His overalls have yellow buttons on them and also have a single pocket on the front.