over a year ago:
It's his power that makes him that way, when he didn't have his power he was just normal Gabriel mom issues and all, but once the eclipse was over he was sylar again the souped up psychopath. I really do think she's dead BTW. the writers have already established that the future isn't tangible it changes and just because you can see the future doesn't mean it'll happen that way. besides in the next book Fugitives Sylar gets some sort of evil apprentice (sorta like a sith lord lol) anyway I don't think he's going to go back to being good any time soon.
who knows maybe she isn't dead and she'll show up at the end of the next book all preggy and what not O.o lol *wishful thinking!*