Peter

[Michhhy]

Sylar's melted plastic. That's more than just metal.

Besides he does have Eden's power he used it on Issac[/b]

That wasn't Edens power. Her power was pershuation.
Peter used some sort off a banshee wail that sent Isac flying. Propably one of Sylars stolen powers.

(Theory) I think every power has a spesific purpose. Peter reminds me of a caracter in a very old comic(don't remember the comics name) called Poet. Poet had the abillity to counter all powers. Peter is able to copy others powers and should be able to remake them to work to his opponents disadvantage.
Syler has the power to understand and repair items and power. Insted of doing his set task of fixing the person / power, he steals the power.
Unfortunetly like Poet, Peter has a fatal flaw and dies, leaving the rest to deal with Syler.
Poet had an unfortunet end. Since his power depended on his oponents having a power to counter, he was killed by a group of normal humans.