Hera

Hera, Goddess of Women and Marriage of the Olympians. Wife of Zeus. Mother of Ares.
First appeared in Season 2. Died in Season 3.
Season 2
Hera first appeared at Fionn Corvin's Halloween party, where she gave him the name The Godkiller. The name stuck, perhaps a testament to her power.
Season 3
Died in Season 3.