She was the daughter to the king of vampires, King Kagan, conceived when the vampire king raped her mother.
Her beauty was was truly brought to the front when she transformed.
Instead, he destroys it, granting the vampire her freedom.
In the first one, she is seen as the owner of the brothel when the Geckos arrive to await their contact.
Viktor lied to Selene, telling her that a pack of werewolves killed them.
The clash of those two sides that is Selene's character makes her one of the hottest vampires, by far.