Elsor existed as a male Bith Padawan. He fought for both the Jedi Order and the Galactic Republic during the Cold War, a conflict that involved the Sith Empire.
Being a Force-sensitive Bith, Elsor underwent training by the Jedi Order to learn about the Force. He achieved the rank of Padawan under the guidance of Jedi Master Heljus. During a campaign on Hoth to prevent the Sith Empire from seizing control of the planet, Elsor and his Master were stationed in the Clabburn Tundra not far from Aurek Base.
While on a mission within the tundra, the Jedi pair, along with their troops, were surprised by an ambush from an unknown entity. Heljus used the Force to trigger an avalanche, which allowed Elsor to get away so he could go back to the base and heal. However, Master Heljus didn't make it back. Confused by the avalanche and with all communications blocked by the White Maw pirates, Elsor sought assistance from a Republic hero who was in the area to take down the jammers. Master Heljus's transmission eventually got through, and she revealed that the cause of the dark attack was the Beast-Lord called Brutann from Onderon. The hero managed to defeat Brutann, and even though Heljus had died, Elsor expressed his gratitude to the Jedi and said that he would go back to Tython once he had recovered from his injuries.