Sables is a Marine, who aspires to catch pirates and maintaining the world at peace.
Sables seems calm and collected, but that is only a disguise. He is actually easily angered, to the point where he threatened Akainu "to shove my boot in your face" before his fight with Aokiji. When his comrades are injured (no matter the rank), he shows concern for them, and protects them at any cost.
Sables wears a black helmet with golden linings. He wears a golden jacket with a dark red shirt and a red tie. Even though he is a normal Marine, he wears a black cape with white details. He is quite tall, about four heads taller than Luffy. His shoes are black, and so are his pants. He wears black gloves, and wields a sword.