Sylar
One would hope, but the fact is no one would be that smart. I know there are people in my past who I would let even save my life if they turned up here. What you did to her was just too much. She will dismiss anything you say, just as she'll dismiss anything I say on principle.
I'm sorry that happened to you. All of it. I can empathize with some elements of it. The Watchers Council abandoned me and then I killed someone by accident. The only person who was there to support me, the man who became the closest I ever had to a father, trained me to become an assassin for him as he tried to end the world. Then there was comas and prison sentences and general badness for me.
My point is, I can see both parts of this. I can see why Nathan would consider you to be a danger. Killing is addictive. I remember it well and yes, I still crave it sometimes. I can see why the Claires will never forgive you. But I can also understand where you come from.