Samus Aran is the legendary bounty hunter and the sole playable character in Metroid: Other M. Her strength lies in her versatile Power Suit and an array of powerful weapons and movement abilities. Understanding her core mechanics is key to success.

- Power Suit: Samus's iconic suit provides protection and houses her various abilities. Its capabilities are gradually authorized by Adam.
- Beam Weapon: Her primary attack, the Arm Cannon, fires energy blasts. It can be charged for a more powerful shot (Charge Beam).
- Missiles: Secondary, powerful projectiles effective against armored foes and for destroying Missile Blocks.
- Morph Ball: Allows Samus to transform into a small sphere, navigating tight spaces and deploying Bombs/Power Bombs.
- SenseMove: A quick dodge maneuver, crucial for avoiding damage and setting up Overblast attacks.
- Overblast/Lethal Strike: Powerful melee attacks initiated after a successful SenseMove or by grabbing a stunned enemy.
Samus's effectiveness is directly tied to the abilities Adam authorizes. The game's progression is heavily reliant on gaining access to her full arsenal.