"I'm loyal to nothing...except the Dream."
He carries himself with a quiet assurance, strength tempered with compassion, though he can be pretty awkward in social relations with people, especially attractive women. He has the exact opposite of a poker face—everything he’s thinking or feeling kind of rolls right across his face like that little crawling band of text at the bottom of your screen during news broadcasts. He’s soft-spoken and unfailingly polite except in the heat of battle.
When he’s not in his Captain America uniform he’ll favor vaguely military-type clothing such as cargo pants with many pockets and boots. He’ll also like to wear a nice suit once in a while. He’ll stay clean-shaven and keep his regulation haircut.
There are three qualities that form the core of who Steve Rogers is: courage, loyalty, and a sense of fair play. Each of these manifests in a number of different ways, but the majority of who he is as a soldier and a man comes back to one of these qualities.
Steve was almost too brave for his own good, before he got into the military. He got beat up a lot, taking on or standing up to people who clearly got the best of him physically, but he never backed down or ran away. He believed that if you start running you never stop, that standing your ground was the best thing long-term even if the immediate result was a lot of pain
Captain America's only weapon was his shield, a concave disk 2.5 feet in diameter, weighing 12 pounds. It is made of a unique Vibranium-metal alloy that has never been duplicated.
Captain America represents the pinnacle of human physical perfection. He has a very high intelligence as well as agility, strength, speed, endurance, and reaction time superior to any Olympic athlete who ever competed. The Super-Soldier formula that he had metabolized had enhanced all of his bodily functions to the peak of human efficiency. Most notably, his body eliminates the excessive build-up of fatigue-producing poisons in his muscles, granting him phenomenal endurance.
Captain America had mastered the martial arts of American-style boxing and judo, and had combined these disciplines with his own unique hand-to-hand style of combat. He had also shown skill and knowledge of a number of other martial arts. He engaged in a daily regimen of rigorous exercise (including aerobics, weight lifting, gymnastics, and simulated combat) to keep himself in peak condition. Captain America is one of the finest human combatants Earth had ever known.
Steve Rogers was a scrawny fine arts student specializing in industrialization in the 1940's before America entered World War II. He attempted to enlist in the army only to be turned away due to his poor constitution. A U.S. officer offered Rogers an alternative way to serve his country by being a test subject in project, Operation: Rebirth, a top secret defense research project designed to create physically superior soldiers. Rogers accepted and after a rigorous physical and combat training and selection process was selected as the first test subject. He was given injections and oral ingestion of the formula dubbed the "Super Soldier Serum" developed by the scientist Dr. Abraham Erskine. Rogers was then exposed to a controlled burst of "Vita-Rays" that activated and stabilized the chemicals in his system. The process successfully altered his physiology from its frail state to the maximum of human efficiency, including greatly enhanced musculature and reflexes.