Who is Mister U.S.?
Mister U.S. is a patriotic superhero in the tradition of The Shield and Captain America. He first appeared in Image's Big Bang issue 8, where there were 6 short origins shown. Each origin is as it would have been told in a different era of comics, and the characters differ in large and small ways (check out the issue for more detail):
The Golden Age version. Real name: Caspar Milquetoast. Situation: works as an agent of the US military during World War II.
The Silver Age version. Real name: Dave Donovan. Situation: affiliated with the US military, but often superheroing on his own.
Batman TV era version. Real name: Joseph Average. Situation: Agent of G.O.O.D.G.U.Y.S. -- Government Operatives for Organized Defense of the Genuine United (Yeeha!) States, who stop the B.A.D.G.U.Y.S.ÑBrotherhood of Agents to Destroy the United Yucky States. Sidekick: US Jr.
Relevant Seventies version. Real name: Brett Kowalski. Situation: Forced into serving a conservative, controling US government, Mister U.S. retires for a while and goes out to find America.
Eighties version. Real name: Casper Milquetoast. Situation: Basically the Golden Age version, retired. He has recently learned that he's not truly human.
Im Age version. Real name: Unknown. Situation: He's a butt-kicker. He kicks butt. That's what he does.
Powers: All versions have mechanical/robotic/bionic arms and one leg, plus the bottom of the feet replaced by whatever the current wonder-material was. Golden Age has a "super-radio" in his head. Silver Age, a transistorized ear. Batman TV Era, a two-way infrared eye. Eighties, an artificial brain. Im Age, a glowing robotic eye.