Sigma is one of the kindest mermaid prince. He has a pink and sparkling fishtail embedded with white and shining pearls. Sigma also has a 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 earrings on both of his ears.