Samus Aran is a tricky one. Like many Nintendo characters, she has (in most games) been voiceless. As a result, there hasn't been a whole lot of character development surrounding this icon (though in some sense more than a Link or Mario). She still has this status as an important character in gaming history as a female protagonist in one of the longer running Nintendo franchises, especially with the heavy emphasis on her gender at the close of the original game.
That emphasis is part of the tricky presentation of Samus's femininity though:
Samus Aran Has Always Been Sexualized