Locus-Walker is the Ethereal who first taught Alleria how to use the Void without falling victim to its corruption. Now, he teaches the other Void Elves in Telogrus Rift, and players can listen in on one of his lessons!
Locus-Walker Players who approach Locus-Walker during Alleria Windrunner's Hunt for the Harbinger questline can ask him about his decision to teach the ren-dorei about the Void, and even hang around to overhear a lesson about maintaining sanity even in the face of the Void's whispers.
Do you wish to learn more of the Void? It has many lessons to teach us amongst its maddening whispers. One must simply learn to properly listen. Why have you chosen to teach the ren'dorei about the Void? Your question is not without merit.
Long ago, I chose to teach Alleria about the ways of the Void. But she had proven herself worthy of such lessons with my rescue from the Legion.
Perhaps I merely wish to sate my own curiosity. And Telogrus Rift and the ren'dorei are both quite the curiosities, aren't they? Stay awhile and listen. Locus-Walker says: Let's discuss maintaining your sanity.