Luke Castellan

Luke Castellan is the main antagonist in the 2010 and 2013 adaptations of Percy Jackson & the Olympians: The Lightning Thief and Percy Jackson: The Sea of Monsters.

He is the Greek demigod son of Hermes, the grandson of Zeus and one of the cousins and the arch-enemy of Percy Jackson.

Kronos (Percy Jackson) (great-grandfather)

Rhea (great-grandmother)

Zeus (Percy Jackson) (grandffather)

Personality
Luke hates the gods, believing them to be terrible beings who do not care about their children, mostly due to the fact that he felt ignored by his father. However, he is unaware that his father actually cares about Luke and sees Luke as his favorite son and pointing out that even Percy's own father abandoned him as well.