Felwinter really doesnt belong to any class. Even though he's stated to be a warlock, he wears hunter armor and can use titan abilities. Its part of a joke with him because of Felwinters Lie, but what was Felwinters Lie? The game description says its a shotgun but its clearly a sniper. The lore says hes a warlock but he is instead wearing hunter armor, and knee charged a titan(Citan-dark age warlord) in the face. The knee charge being the titans air borne shoulder charge. I bet hes not really even dead, i bet he's just chillin waiting for a good time to self res cause warlocks dont need to ghosts to res(snaps fingers)