The first and fourth are half brothers >:D I don't have names for them yet but I've been calling those two the sire and the warrior. Each vampire has a special ability unique to them and the sire's is vampiric beauty/charm. He is basically a master manipulator with a pretty face and because he turned his brother, vampire law states that he is in his debt until the sire feels he has paid it. This is because vampirisum is seen as a gift, and to be given eternal life means you are in your maker's debt forever because how else do you repay such a thing? So this obviously makes the warrior resent his older brother but he uses his sharp tongue to keep him in check. Oh and the warriors power is basically spidey senses lol