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Klefarolijah
She has a fascination with the way they hunt. They way they kill. They're different yet similar in their ways. Klaus is proud, Stefan ashamed but satisfied. Both are brutal and insatiable. To her its kind of beautiful. Vampires in the raw. She knows she could never match it, because at the same time she sickened by it. But they want her to take part.
Klaus tries to force it on her, and Stefan tries to coax her (but then he becomes to ripper and his brutality shows itself to her as well). She can't refuse forever, but she can run. And she does, straight to Elijah, who has honor, even though he has the same ability to cause pain and mayhem.
He wants to help her, and tries his best. But even he can't hide her when they come. He makes the mistake of leaving her alone for a time. They find her, and he finds out to late. Klaus has never taken well to people disappointing him, and Stefan is just to far gone. She can't be his because she's their's but she doesn't want to be. But in the end their is no choice and its a losing battle which she pays for with her life.
Elijah finds her, bloody and grey, on his bed.