He is brave and kind-hearted.
Santiago is a Latino kid with tan skin, wavy brown hair, thick eyebrows and hazel eyes. He wears a red waistcoat with yellow accents. He wears yellow trousers with a brown belt on it. His shirt is white. On his left arm he wears a blue glove with a skull on it.
Santiago will debut in the first episode of Santiago of the Seas. Before his debut, he was seen in a promotional poster and a teaser trailer.
- He was originally called Capitan Calavera.