Sigma is a young man with long, straight hair that reaches to his waist. He also has sections of hair that appear to have spikes sticking out and are separated by a parting in the middle of his face. The colour of his hair is lilac on the left side and white on the right side. The colour of his eyes is greyish. He also wears earrings in both of his ears. He is wearing a long white coat with black trousers.