Mason Lockwood was a character who first appeared in the first episode of the second season of The Vampire Diaries. He was a werewolf who was Richard Lockwood's younger brother and Tyler's uncle. A Mystic Falls native, he was estranged from the family before returning to Mystic Falls from Florida in the wake of Richard's death. He had a relationship with Katherine Pierce and worked for her to find and retrieve the moonstone. Unbeknownst to him she was just using him. He was a werewolf, friends with Jules and he also knew other members of her pack. He was killed by Damon Salvatore who ripped his heart out which resulted in instant death.
In Season Three, Mason returns as a ghost and is determined to make Damon apologize for killing him and to help out Tyler.
Mason was a member of the Lockwood Family and the Apisi Werewolf Bloodline.