May Castellan

May Castellan is the mother of demigod Luke Castellan. She lives in Westport, Connecticut. She made her first appearance in The Last Olympian.

May had the ability to see through the Mist like Sally Jackson, Maria di Angelo, and Rachel Elizabeth Dare. Hermes had warned her against a job the gods thought she might be able to help them with. Hades cursed the Oracle decades ago and the spirit of Delphi has yet to move on and they thought a clear sighted mortal would be able to break the curse. She went insane and when it constant episodes about Luke's fate. She would make peanut butter sandwiches, cookies, and Kool-aid for him, constantly thinking any boy to come by would be Luke. He came to her and asked her blessing so that he may be treated in the River Styx and Percy and Nico arrive to discover just how he had done that.

She remained in her crazed state at the end of series, even though Hermes was devastated by it and still visited her often.