Tes is a member of the Military Guild on Krypton. As a member of the Black Zero unit, pride of the Kryptonian army, she was present in Kandor when Brainiac attempts to steal the city. Her unit includes her husband ( Aspirant Major Ak-Var) and her commander, Ursa.
During the the battle for Kandor, Tes loses her life and fears for her daughter, Thara Ak-Var, who resides in the city doomed to be shrunk and placed in a bottle.