He was the one that was always messing with the drunk titans in the "titans only" bar. [spoiler]he always put on titan armour, walked up to the bartender and got a shot. He drank it,walked up to the window, and jumped out. He repeated this process numerous times until, the biggest titan there furiously shouted "if he can do it, so can I! So he got a shot, and jumped out the window. The bartender called commander zavala and ikora Rey, and told them that the warlock was messing with the titans again using his radiance![/spoiler]