Nico di Angelo is a fictional character from the Percy Jackson & the Olympians series by Rick Riordan. He is the son of Hades, the Greek god of the underworld, and has the ability to control shadows and communicate with the dead. Nico is known for his dark clothing and brooding personality, often feeling isolated due to his powers and lineage. Throughout the series, Nico plays a significant role in various quests alongside other demigods, including Percy Jackson and Annabeth Chase. His character development explores themes of friendship, acceptance, and the struggles of living in the shadow of his father's legacy.