Eldin Sunstrider, brother to Kael'thas, who was for a long time the heir to the throne of Quel'thalas. Eldin fought alongside his father, Anesterian durring the Third War.
Eldin was raised in Silvermoon, born hundred and thirty years before the first war. He admired his powerful brother. He had never left Silvermoon until the Third War, after which he went into hiding from the Scourge. He turned to Dalaran, but for long he was imprisoned by the Kirin Tor for practicing with Fel magic.
While keen with Fel magic, he seems to hold the old ideas of the High Elves in high regard. He looks to turn away from them, seeing them as traitors but he wishes to see that ancient traditions does not go to waste.