Apollo, known as Lester Papadopoulos in his human form, is the Greek god of the sun, light, healing, disease, plague, music, art, poetry, archery, reason, knowledge, truth, and prophecy. He is the twin brother of the goddess Artemis, and they are together known as the "twin archers". He is the main protagonist and narrator of The Trials of Apollo series and one of the supporting characters in the Percy Jackson and the Olympians and The Heroes of Olympus series.