May Castellan (Luke's Mom)

It is shown that May attempted to become the Oracle of Delphi, not knowing that the previous Oracle had been cursed by Hades so that the Oracle has to remain in that body, and goes insane, in The Last Olympain when Percy went to her trying to find out more about Luke. This affects Luke greatly and forces him to run away. This cuases May to feel lonely. May's only apperince is in the Last Olympain.