Jimmy Inendino could very well be called the boss of the entire Chicago Outfit, although, as Chicago has pointed out, the Outfit is controlled by a "panel", or duo, rather than one individual.

And yes, Jimmy I is a very feared, very tough capo, with an extremely illustrious past: he was a member of the Wild Bunch, along with Harry Aleman, Butchie Petrocelli, and others, without a doubt the most feared, violent crew of their particular era. They were Taylor Street kids, some of the last real gangsters to come from that area.

Nevertheless, Jimmy I is a very charismatic, friendly man in public, slightly reserved, who treats his men well & keeps things under tight wraps.