The one of the weaker characters in any fighting game. This character is usually so pathetic that only the best can win with him/her. Playing character hero is incredibly manly, regardless of whether the player wins or loses.
The phrase stems from guitar hero, where the player must play flawlessly in order to do well. similar to the above, a character hero must be used to perfection in order to even stand a chance.
Captain falcon in SSBB is a character hero. he has no redeeming traits, and is one of the worst characters in the game.