Jax was one of the first clones that came to maturity on Kamino. Throughout his training Jax continuously pushed himself beyond the limits of his body. All too often, when his brothers were in a rest cycle Jax could be found honing his skills on the Kaminoan training courses.

Jax shipped out from Kamino and saw his first ground action in the Battle of Geonosis, where he and thousands of fellow clones were deployed. He served with distinction when assigned to the extraction force sent to aid the beleaguered Jedi from the arena on Geonosis.

Shortly after Geonosis Jax's superiors noticed his innate talent for getting the job done and, even better, getting that job done with a minimal loss of friendly forces. He was promoted to Sergeant, a position he approaches with a degree of enthusiasm. He is determined to do his job to the best of his ability.

Belief (The Republic): Beyond what the Kaminoans programmed into his clone DNA, Jax believes firmly in the democracy of the Republic. To him the Separatists are a people being horribly misguided by their leaders, and the CIS needs to be brought back into the Republic fold for the betterment of its people.

Duty (Ground Superiority): It should come as no surprise that a soldier like Jax has a mindset that wars are won with boots on the ground. Only after the clanker armies are a pile of scrap metal can peace and order be restored to the Republic.

Jax shares the trademark facial features and physique of all of the other Kamino grown clones based on the Jango Fett template. He prefers to keep his hair cut down in a strict military style.

Jax's armor sports the traditional green color accent given to those clones with the rank of Sergeant, while his helmet has a Republic symbol painted on it for each of the combat missions he has participated in.