Demeter (Blood of Zeus)

Demeter is the Goddess of the Harvest and Agriculture. She is the sister of Hestia, Hera, Hades, Poseidon, and the sister/lover Zeus, and the half-sister of Chiron. She is also the mother of Persephone and a member of the Pantheon who resides on Olympus. She is a minor character in seasons 1, then one of the main antagonists of season 2, and later a supporting character in season 3 of the Blood of Zeus.