Samus Aran
is the main character of the Metroid games.  She's a bounty hunter, and helps the Galactic Federation. She has many enemies, including Mother Brain, Ridley, Kraid, Dark Samus, and the Metroids. Because she does not remove her suit or talk much, people thought she was a boy until they saw the secret ending of Metroid, which shows Samus without her suit.