40. The Night King
We begin our countdown of Game of Thrones coolest characters with its coldest character. Transformed into a demonic killing machine a millennia ago by the magical Children of the Forest in order to stop their slaughter by humankind, the Night King turned against his makers. Now he and his fellow White Walkers – along with the army of zombies whose numbers grow every time he raises his slain enemies from the dead – are ready to unleash eternal winter on Westeros. Only the Wall stands against the regent's dark reign. And once he drops one of his signature cocky "come at me bro" gestures ... oh, it's on.