Debut: Metroid (1986)
Affiliations: Galactic Federation
Availability: Starting fighter
Background: Samus is an intergalactic bounty hunter with a powered armor suit. Her suit is equipped with an energy canon, though she has a vast array of abilities which she slowly acquires over each game. She carries out orders from the Galactic Federation, hunting metroids and space pirates, particularly Ridley, the space pirate who killed her parents. Samus is the first playable female protagonist in a major video game series.
Reasoning: She has been around from the start as well and is confirmed for SSB4.
Thoughts: Samus is becoming more and more appealing to me the more I play as her. I am not surprised to see her Final Smash has not changed. My only comment is when she curls into her ball form. The detail in the design, especially for the Wii U is lacking.