Captain America: Steve Rodgers. Given experimental super soldier serum which turns him from a weakling into a super soldier. The serum’s creator was killed shortly after Steve’s transformation, making him the only such super soldier in existence. Fought in WWII against the Nazis and believed dead after being lost in the Atlantic. Kept alive instead, frozen in a block of ice. Eventually thawed out in Avengers #4. Super human strength, endurance, agility, and intelligence paired with advanced military training. Wields a shield made from the nearly indestructible, vibration absorbing metal, Vibranium.
Cap is frequently haunted by the death of his former sidekick, Bucky. Blaming himself for what happened, Cap is unwilling to take the same risk with Hulk’s former associate, Rick Jones. Captain America is also forced to regularly confront Baron Heinrich Zemo, the Nazi scientist responsible for Bucky’s death.
Following the Death of Baron Zemo and the departure of his teammates, Captain America becomes the leader of The Avengers, taking on the responsibility to train the next generation of heroes. (Avengers #17)
Created by Joe Simon and Jack Kirby in 1941
First appearance: Captain America Comics #1.
Joined Avengers: Avengers #4