AppearanceSmoker is a muscular bluish-grey haired man, who carries the very distinct trait of always being seen smoking two cigars at once. He wears a large thick white and blue specialist Marine jacket which he keeps open with greenish fur lining the neck, wrists and hem. Many cigars are are strapped to the jacket which has the kanji for '"absolute justice'" (正義, Seigi) written on the back of it. He carries a Seastone tipped jutte as his weapon. He also wears brown leather gloves, blue jeans with a brown belt and large military issue brown leather boots.
Smoker is a tough Marine, who when first introduced, was trying to track down Luffy in Loguetown. Unlike many other Marines in One Piece, Smoker does not follow the rule of Absolute Justice and follows his own brand of justice, which he later preaches to Tashigi. Smoker's view on justice also allows the Straw Hats to remain free even being pirates during the Arabasta arc. He warned Luffy that as a Marine, next time, he will have to try and capture him. Smoker also didn't like taking credit in Arabasta for the Straw Hats work in defeating Crocodile. He told the World Government to "eat shit". He also tends to hold grudges toward pirates who have escaped him. For example, he prepares to capture Ace and is prepared for a big fight. However, after Luffy has thrown him through several walls, Smoker barely acknowledges Ace. He merely shoves him into the ground and prepares to go after Luffy, who is his primary target.
Despite his stern, businesslike manner, he does seem to have a soft side. In Loguetown, when a little girl bumped into him and dropped her ice cream on his trousers, he takes it in good heart. He even gives her money to buy a new cone.  He also shows respect and even protective kindness to his subordinate, Tashigi. Smoker also let Luffy go after he found out that Zoro was ordered by Luffy to save Smoker from drowning.
It seems Smoker doesn't like people who make too much noise around him, as he claims that it "breaks his flow".
Lastly, he does not trust the Shichibukai as he sees them as nothing more than pirates
He seems to know Aokiji. Although, the nature of the relationship of the two men is unknown.
He seems to be a close, personal friend of Hina due to their relationship dating back to their days of training.
He has a close realtionship with his subordinate Tashigi. However he appears to act really harshly to her mistakes such as confusing another soldier to Smoker due to her not wearing her glasses.
He is not afraid to openly challenge the higher ups within the Marines or World Government.
EnemiesHe has a strong hatred for Luffy dating back to when Luffy managed to narrowly escape him at Loguetown. Ever since then, Smoker has been relentless in trying to capture Luffy. Even after Luffy ordered Zoro to save Smoker from drowning after escaping the Rainbase Hideout, Smoker still had the agenda to someday capturing Luffy only repaying him by letting him go that one time. Smoker is even willing to go as far as to the New World to capture Luffy. Smoker is Luffy's longest running Marine foe to date. When Luffy was about to be executed by Buggy, Smoker saw the laugh Luffy gave off to mirror that of Gold Roger's twenty-two years ago, and considered Luffy to be a potential danger to the world. Smoker has always wondered why Dragon would save Luffy in Loguetown, until Sengoku made it public that Dragon is Luffy's father.
He also made an enemy of Ace during the Arabasta Arc while Smoker was trying to capture Luffy. Smoker simply states that he couldn't let a pirate such as Ace go so easily. But after Ace helped Luffy escape from Smoker, it is possible that Smoker may have held a grudge against Ace for that.
Even though the Shichibukai have allied with the World Government, Smoker, just like Sengoku and Kizaru, thinks they are nothing but pirates and cannot be trusted. Indeed, Smoker made an enemy of Crocodile after seeing Operation Utopia, and of Boa Hancock after she defended Luffy.
Abilities and Powers
Smoker is quite a formidable fighter, and his fighting abilities are well beyond that of a normal Commodore. He was on the verge of capturing Luffy on their first encounter in Loguetown, had it not been for Luffy's father Monkey D. Dragon. During the Arabasta arc, he was able to hold his own against Ace, the second division commander of Whitebeard. And after the Enies Lobby events, he did not find any satisfaction in capturing a pirate with a bounty of Image:Bsymbol.gif50,000,000. When Luffy meets him in Marineford he comments that Smoker has gotten far stronger before being pinned to the ground.
He is one of the few marines that has ever beaten Luffy, the others being two high-ranking admirals Aokiji and Kizaru as well as the brutish Sentomaru. As a result, Luffy resorts to running away from Smoker if he ever sees him.
It is also implied that Smoker has both excellent hearing and memory, as shown during the Arabasta arc where he tells Sanji to attack the third Bananawani that entered the room, since "That growl just now was the same as the one who ate the key."
He also seems to have some knowledge of haki.
Devil FruitSmoker has eaten the Moku Moku no Mi Devil Fruit. The Fruit allows him to control any smoke around him. He can also change part or all of his body into smoke at will, like other Logia-type Devil Fruit powers. He can also manipulate the smoke to make it soft or hard, allowing him to hold and constrict others within it.
At this point, he doesn't appear to have any exploitable weakness, due to his ability to be intangible. However, in the beginning, Smoker has yet to master his Devil Fruit powers, as when he was caught off guard, Luffy sent him flying across a restaurant. However, during the fight in Marineford, when Smoker was diverting his attention to Luffy's arrival and a pirate slashed him, the blade bypassed his smoke body. This indicates that, overtime, Smoker has trained his abilities to activate by reflexes, like Crocodile did.
Using his smoke powers, Smoker can power up the engines of his motorbike, the Blower Bike, for in-land transportation.
WeaponsHe also wields a large jutte tipped with Seastone, a material that affects Devil Fruit users in a similar way to the sea (a person who consumes a Devil Fruit becomes weak and unable to move his or her body in the water, and Seastone is, in Smoker's own words, "a solidified form of the sea"), which he uses to subdue criminal Devil Fruit users.
His thick clothes are what allow him to carry around his Seastone-tipped weapon, along with the fact that he hangs it off his back so that the tip never comes in contact with him.
When he turns into smoke, the weapon does not turn into smoke with him because of the Seastone. Instead he carries it with smoke while in smoke form.