Calais

"Calais: I am Cal. And this is Zethes! My brother! Leo: Wow. That was almost three sentences, man! Way to go!"

- Calais and Leo Valdez at the entrance to the hotel which Boreas is staying at.

Calais, nicknamed Cal, is a son of Boreas and Oreythyia. He was a demigod until his father offered him and his demigod brother, Zethes immortality. They were named Boreads in the stories. He travelled to retrieve The Golden Fleece with the original Jason. His sister is the goddess of snow, Khione. He does not like her much. He can apparrently only say words with two or less syllables in them. Calais is obsessed with hockey and pizza. In some stories, since he is one of the sons of the god of the north wind, he has the ability to be as fast as the wind or have wings, depending on the story.

Since he was one of the Argonauts, he helped in freeing Phineas from the harpies. He succeeded(along with his brother) in driving the monsters away, but not killing them, due to the request of the rainbow godess, Iris. But, she promised the Argonauts that Phineas will not be harmed by the harpies again. As a thanks, Phineas told them how to pass the Symplegades. It is said that he and his brother will be turned back by the goddess at the Strophades, meaning "Island of Turning."

His and his brother's death was caused by Hercules after tricking Hercules in leaving him behind in searching for Hylas.