 Jax-Ur was fully introduced in the "World of Krypton" flashback segments, where he is depicted as a young military officer and Lara Lor-Van's partner and fiancé.Lara calls off their engagement when Jax-Ur reveals he supports Colonel Ekar, a commanding officer who deems Krypton's Science Council weak and self-absorbed and plans to overthrow it with a coup d'état.When Lara tries to fight Colonel Ekar and is defeated and caught, Jax-Ur tries to convince her to join their cause in order to save her life, but fails.