List of characters in the Camp Half-Blood series
Hermes/Mercury - The Messenger of the Gods and the God of travelers, Communication, and Thieves. He has nearly no role in the first book but is a significant character in the second book where he helps Percy by giving him a flask full of air, backpacks, and his special multi-vitamins, hoping that he will be able to rescue his son, Luke, who had joined the Titans. He is also mentioned briefly in The Titan's Curse. He is bitter about Luke's situation and gets angry at Annabeth in The Last Olympian for not saving him when she had the choice. All of his children and any half-bloods of undetermined parents stay in Cabin 11.