Smoker the White Hunter is a Marine officer and the Commander of the G-5 Marine Base, following the treason of his former superior Vergo. He was first introduced as a captain in Loguetown, where he made it his mission to capture Luffy, and was later promoted to the rank of commodore, due to the events in Arabasta. At some point during the timeskip, he was promoted to the rank of vice admiral. He is also since his debut the superior of Tashigi, serving as her mentor as well.
He is a recurring adversary of Luffy. Due to his actions against Luffy at Loguetown, Smoker can be considered as the primary antagonist of Loguetown Arc, and acts as a minor antagonist during the Marineford Arc. Despite his rivalry with Luffy, for reasons of encountering common enemies they ended up helping each other during the Arabasta Arc, and forming a temporary alliance during the Punk Hazard Arc, returning after both events to their relationship as enemies.
Additionally, he also acts as an ally of Luffy and some of his friends and allies, also for reasons to face a common enemy, during the movie One Piece: Stampede.