If you missed the initial piece, you can find it here. This is a fictional body that incorporated vampires into science as it is understood, and gives them some humanity as well.
Athene is a very ancient vampire, and actually punched Aristotle in the nose once. Tricia was just brought across, because Athene feel in love with her and would not allow her to die. Athene is around 26 years old, except for the millenia, and Tricia is a real 23 years old.