Tirathon Saltheril

Tirathon Saltheril is a blood elf demon hunter who can be found in various places on Mardum. He is seen with the rest of the Illidari at the end of the Demon Hunter storyline.

He can later be found as a boss in the Vault of the Wardens dungeon instance, having been tempted to join the Legion by Cordana Felsong, though curiously he still refers to Illidan as his master and seems proud of his time as an Illidari. He is also a target for the achievement: A Specter, Illuminated.

Speculation
He might be related to Lord Saltheril.