Eve
"Vampires or at least vampire adjacents will not be adversely affected by the bloodmoon's radiation."
"And according to Jonathan Blackwell, the historian, the bloodmoon might even amplify his abilities," I added.
Hades nodded. "Hopefully, it will be the same with a hybrid like me. But since I am immune, for months our scientists have gone to work trying to derive a marker, similar to Eve's Fenrir's marker. When isolated, a vaccine serum can be concocted. Over the years, I have undergone extensive sessions of bloodletting to allow our laboratories to study and analyze my blood, we have a reservoir of blood,"
"Black vampire blood, always extracted at the height of flux activity in Hades," Kael supplied. "So it has more Vampire cells than Lycan."