GUNMETAL

 Gunmetal. The Guardians utility infielder. He holds the "Iron Man' spot on the Guardians team.

Most people including all of this teammates, believe Gunmetal is some overly rich tech billionaire who suffered a personal trageday and built a suit of powered armor to do something about it. The truth is a bit more bizarre. Gunmetal is a robotic combat-chasis driven by a sentient AI.

Gunmetal wasn't created in a secret government program, or through the machinations of an Arms Manufacturer. He's actually the creation of a high school Student from Melbourne, Florida named Morris. Morris came down sick one day, and during this sickness, became delirious. When the illness broke a week later, Gunmetal was standing in Morris's bedroom, complete and programmed. Unfortunately, Morris died of a stroke, at the age of 17, two hours after completing Gunmetal.

The robot tried to get his creator to a hospital on time, but it was no use. Morris's death left Gunmetal (a name it chose for itself) with no guidance but a bloated, inefficiently (and sometimes redundantly) written set of "Moral Guidelines" Gunmetal found in his memory storage called DontBeAnAsshole.doc.

Using this code, it dedicated itself to helping humanity, and eventually became a member of the Guardians.