Idea!
Mmk I was thinking of one of commensense's Paire fics that has Emma in it (written wonderfully, btw) and it suddenly hit me...
So I was thinking about Emma's ability, and the fact she can see emotions as colours, and she's going to be helping Peter connect with people again because of that ability. (At that point I was planning a Paire fic based around Peter's usage of Emma's ability) And then suddenly I had a thought:
What if, upon using Emma's ability, or accidentally using it or something, Peter talks to 'Nathan' and the colours he sees make him realise it's not his brother? Maybe that's how he finds out about Sylar. 'Cause if her ability is supposed to make him closer to his family, he'd notice something was off with his brother, right? Wrong? I dunno if I'm clutching at straws here but it's just a thought that popped into my head. Heh.