Sigma is a young man with long straight hair that reaches his waist. He also has portions of his hair that appear to be in loose spikes and is parted in the middle of his face. The color of his hair's left side is lilac and the right side is white. His eye color is greyish. He also wears a school uniform. He acts confident and composed even at times of crisis, giving the impression that he's perfect. But when alone he's very panicky and doubts his skills. He's overall very sweet and endearing.