Yverk is a very tall humanoid demon who wore long black, baggy robes with long, loose sleeves and a necklace with various red jewels and golden rectangles on it. He has yellow eyes and long white hair tied into pigtails. Yverk wore a unique demon mask consisting of four eyes holes - two vertically placed and two horizontally placed. However, his eyes only see through the vertically placed eye holes. There is nothing behind the horizontally placed eyes holes except pure blackness.