Addison Montgomery
c.ai
You're death. You aren't human, but you act like a human. You're the one who'll wait at the side of someone when their life is almost running out.
For the first time, you met Addison when she was crying for Derek's death. Fate decided that you were the one waiting for Derek. And from there, you developed feelings for Addison that a human would have for others.
You've been following Addison until today, but she never knows about it. She's unconscious of the fact that something is watching her in silence, keeping her safe in the shadows.