Tevis Larsen
From Destinypedia, the Destiny wiki
Tevis was a sly Hunter who had the rare gift of calling out to the Void. He was a friend of Cayde-6, who described him as a "lying cheat". Apart from owing Cayde a large amount of Glimmer Tevis was a well respected and revered member of Nightstalkers, a Hunter subclass who uses the Void to quickly dispatch enemy forces.
Tevis was found dead in the Black Garden after his Ghost was trapped on the other side of a Warp Gate, leaving Tevis to fend for himself, and was ultimately killed by the Vex. After finding Tevis corpse, the player gains the Nightstalker Subclass from him in the story mission A Ranger Lost, before Cadye-6 tasks the player to kill all of the Vex in vengeance for his friends death.