Nino was old-school Cosa Nostra, his cousin was Frank Scalice, the underboss of Anastasia. This guy was pretty much Nino's idol and the one he modeled himself after.. he'd tell Dominick "There was no finer man than Frank, they don't make them like him anymore"

He doesn't particularly give the killer vibe, but then again neither does Roy. The twins have this sinister look on them, but more than anything they look like the typical young, low-level wannabees.
Chris does look a little crazy though, I agree.