Kelly Donovan

Kelly Donovan is a resident of Mystic Falls and is secretly a Succubus.

Biography
Kelly is first seen at a nightclub in an unnamed town, dancing sensually with an unnamed woman, who then kisses Kelly, now urging Kelly to take her somewhere. Kelly obliges and the two have uncontrollable sex at an apartment that Kelly took from another woman. The sex ends up killing the girl after Kelly drains her life energy with a passionate kiss.

She then returns home to her house, much to the surprise of Matt, as he hasn't seen her in years.

Trivia

 * She's bisexual.
 * She once had hardcore sex with her childhood friend Jenna Sommers, though Jenna keeps this a secret from Elena and Jeremy out of shame.
 * She thinks Hulk is a "champion of strength and sex" as well as a descendant of Hercules, but the latter is untrue.
 * She is currently aggressively hooking up with Katherine Pierce.