|Chronological and political information|
- "A Sith after my own heart. I was a Jedi once, full of spit and fire. For peace, of course."
- ―Kalatosh Zavros
During the Mandalorian Wars, Kalatosh was one of the Jedi that joined the Revanchists that went against the express command of the Order. However, during the start of the Jedi Civil War, Kalatosh succumbed himself to the dark side and joined the Sith Empire. In 3956 BBY, he was present on Taris until he was perished in the planet's destruction by Darth Malak. With his physical body destroyed during the bombardment, he resurfaced as a Force ghost and spent a few centuries on the Taris which led to the Galactic War. In 3,642 BBY, he wreaked havoc on Taris, so the Jedi Order and the resurgent Sith Empire sent people to solve the matter.
After Kallig added Horak-mul to the collection did the Sith Lord go to face Darth Thanaton. However, the power of four ghosts proved too much. As Kallig's body began to fail, the ghosts threatened to drive their captor insane, forcing Kallig to find a way to subdue them.
After repairing their body with the aid of the Mother Machine on Belsavis, Kallig journeyed to Voss to subdue the ghosts. Kalatosh, having never heard of Voss in his lifetime, called Kallig crazy. However, with the aid of a Gormak Force-shaman named Hadrik, Kallig was able to use a mind-healing ritual to defeat the ghosts, subduing them.
After Kallig successfully defeated Thanaton and gained his seat on the Dark Council, the ghosts (with the exception of Horak-mul) pleaded to be freed. Their plead, however, was refused, and Kallig reabsorbed them.
- Star Wars: The Old Republic (First appearance) (Appears as a ghost or a spirit)