Jax appears to be a purple-colored cartoon rabbit with a tall and slender build, yellow eyes and yellow teeth. He wears light pink-colored overalls and pale yellow gloves.

He is a mischievous, laid-back, calm, sassy, impulsive, egotistical, and brazenly condescending individual, and rarely shows any empathy or remorse for those around him. Despite his occasional bouts of rash, impetuous behavior, he normally maintains an unexpectedly calm and composed demeanor, yet his flattery is generally insincere and often borders on outright insult.