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Bonnie, 'The Vampire Diaries'
Who: Kat Graham
What: Resident witch
Powers: Well, she's got the power of 100 witches, and she's using it to keep the balance of nature. And also to revive her dead boyfriend, save her BFF from getting eaten, and make leaves dance all around.
Quote: "We're not gonna let you get used in some creepy sacrifice ritual."