-Elijah Mikaelson is the brother of Klaus. A part of a family of vampire/werewolf hybrids banished from New Orleans a century ago.
Elijah: [to Sabine] You ever experienced something so profoundly wonderful that when it was taken from you your life felt unbearable?
Sabine: Yes, I have felt that. And I have the scars to prove it.
Elijah: I believe that when you love someone and that person loves you in return you're uniquely vulnerable. They have a power to hurt you that's like nothing else.
[to Klaus] I...let this person in. I let her in. I don't let people in. You knew this, and you've taken her from me. I needed her and you've broken me.Elijah