A true hero
From his real name Steve Rogers, Captain America is considered the first of the Avengers. As a young man, he was considered too puny to join the army during World War II, but despite his many attempts, he was asked to participate in a scientific experiment to make him a super soldier. The experiment was a success and he became much taller, stronger, faster and almost indestructible with extremely enhanced recovery capabilities. During the war, he fought Red Skull, the leader of Hydra within the Nazi party, but his plane crashed into a frozen lake and he was presumed dead before being found by chance more than 60 years later preserved in ice. He then became one of the members of the Avengers trained by Nick Fury to fight new, particularly disturbing threats.