His face is scarred from his left ear to his lower right jaw from acid. The burns came from the beginning of his arcane studies in a settlement near Kyonin. He left there shortly to go to Osirion, so as to complete his training.
His scars are sensitive to various irritants, which is part of why he wears scarves or high collared cloaks. When the scars are irritated, he becomes irritated. He also wants to keep people from being too disturbed by the old acid burns.