Nico Di Angelo

Nico di Angelo's backstory involves his parents being the mortal Maria di Angelo and the god Hades, with an older sister named Bianca. After their mother's death during a lightning strike by Zeus, Hades erased their memories and hid them in the Lotus Casino for 70 years to protect them from further harm. They are eventually discovered and brought to Camp Half-Blood, but a series of events, including Bianca's death, leads Nico to embrace his powers as a son of Hades.