Apollo is one of the Greek Gods, who, until the events in Goddess, was imprisoned on Mount Olympus. Apollo is the Greek God of music, poetry, art, oracles, archery, plague, medicine, sun, light and knowledge. His parents were Zeus and Leto, and his twin sister is Artemis. Those in the House of Thebes are his descendents.
Apollo is described as tall, and beautiful, with golden blonde curls, blue eyes and very tanned skin. His skin also described as being "as smooth as a dolphins", which seems to foreshadow his ability his to transfrom into a dolphin. Andy describes him as having a melodious voice, mirroring his status as the God of music. He is the double of Hector.