The Artemis Daughter

Is she really the daughter of Hades? She doesn't look like that. Then who is her mom? Why Hades hiding her from the world? What makes him this much scared?
Vany doesn't remember anything. The only things she remembers are she woke up in the underworld and Hades and Nico was staring at her. Hades introduced him as her dad and he said that she is Nico's sister. Then who is that dead girl Bianca?
Everything is a mess? Who is really Vany is? Will she find it out?

Please help her to find who she is...