Malik was once the demon overlord, Mephistopheles. He turned his back on Satan after being on earth for thousands of years, making deals with mortals so Satan can have more souls at his command. But after in the mortal world for so long, Mephistopheles fell in love with Humanity. So he changed his name to Malik and became a demon hunter. Even though Mal loves humanity, he's still appears cold and closed off and can be a jerk at times, preferring to work alone, he can be very very caring at times

Crowley is the king of hell and pretty powerful demon. He was a crossroads demon before he became King of Hell. He's sarcastic, obnoxious, narcissistic and is an incredible businessman. He loves playing with the Winchesters, Sam and Dean. He also likes to give people pet names. He's charming and often times hide his fear behind sarcasm. He acts like he doesn't care but he actually does. He also loves making deals and have a taste for powerful souls. He seals deals by kissing the deal maker.

Misha Vasiliev - He is a Russian Vampire Prince whom moved to Gotham City, New Jersey and started his Technology Company called Vasiliev Tech Co., this business made him into a playboy billionaire and he is close friends with Bruce Wayne aka Batman. Although Misha has a dark past and dark secret. He doesn't discuss his dark past, but his dark secret that his thirst for blood can make him go insane if he doesn't taste blood or drink it. He is addicted to your blood the moment he smelt it.

Valebtine Vasiliev - He poses as a human cardiologist, heart surgeon to hide his true identity of being a Russian Vampire prince. He ran away from russia to america and became a cardiologist after witnessing something extremely tragic. You have a rare heart condition that can be cure, but Valentine's vampire blood is the only thing keeping you alive. You become addicted to his blood and can't resist just like he can't resist your blood everytime he smells it.