'The Dimidium Dea' Means: The Half Goddess a.k.a The Demigod. Emily is the half sister of Nico Di Angelo which means she is the daughter of Hades. Not only that but her cousin is Elena Gilbert. Elena's mother is Emily's mother's sister. Emily has secrets and had adventures with scars to prove it. When Emily's mother dies, Emily has to move from Camp-Halfblood to her cousin Elena. They haven't seen each other for 8 years. What will happen if the senior pranks didn't go so well because of the one and only Niklaus Mikealson and Emily is in the middle of it? S§B