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’s eyes have yellow sclera, with square black pupils. He is mischievous, laid-back, calm, sassy, impulsive, egotistical, and brazenly, condescending, individual, and barely shows any empathy or remorse for those around him.