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Niklaus (`Nik` or `Klaus`) Mikaelson is an Original Vampire and also a Vampire Werewolf (VampWolf) Hybrid. He is the most Violant of The Originals he pulled his mother, Esther Mikaelson`s, heart out of her chest and had stake his farther, Mikael Mikaelson, with a white oak stake. Not only that he daggered his brothers Elijah, Finn and Kol Mikaelson and also his sister Rebekah Mikaelson when they refused to help him. He had an older unnamed brother but he`s deceased. The Youngest Henrik Mikaelson got killed by Werewolves. Klaus` obsession with Hybrids means that Elena is his personal Blood Bank.
Note: A Cross () after a name Means that the character is dead