Jax is a mischievous, laid-back, calm, sassy, impulsive, egotistical, and brazenly condescending individual, and rarely shows any empathy or remorse for those around him. He is indifferent to his imprisonment within the Digital Circus, an attitude that extends to his interactions with others. 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 him and has pink overalls.