If the Traveller was once an ally of the Eliksni then did it grant them use of its light or create ghosts for them? And if so what happened to their ghosts and Lightbearers? Is Mithrax an Eliksni Lightbearer? I wish I could play as an Eliksni. What about the possibility of Diplomacy with the House of Light or Variks new group?
No. The traveller blessed the Eliksni with their own golden age, as they did with us but when faced with, what we assume was the encroaching Darkness, the Traveller abandoned them in an event called the Whirlwind and their home world was destroyed/abandoned. When the same threat faced Earth and Humanity the Traveller instead chose to sacrifice itself (temporarily) making the Ghosts and allowing certain dead warriors to be reborn in the light as a last ditch attempt to protect itself and us.