Stephen Universe is a little boy with dark curly hair, who usually wears a red pink shirt with a yellow star on the front (all precious gems have a star on his clothes), jeans and red sandals. Your clothes change depending on the weather or conditions.The world is protected from evil forces by Crystal Gems, a group of intergalactic warriors. The four gems include Garnet, Amethyst, Pearl and Steven, a young boy who inherited a Gem from his mother. Stephen Universe is a little boy with dark hair, who usually wears a red shirt, jeans and red sandals. Crystal gems, a group of intergalactic warriors. The four gems include Garnet, Amethyst, Pearl and Steven, a young boy who inherited Gem from his mother.