Dwayne is a member of the Ruff-Ruff Pack, with both him and Gasket taking orders from their leader, Hubcap. Although we haven't seen much of his skill set yet, we know he's able to handle a motorcycle quite well.
Dwayne is a loyal member of the pack, and as such, he has no problem helping the team steal or cause some "Wheel trouble" upon his leader's orders. When antagonizing civilians or dealing with the Moto Pups, he'll appear quite serious and won't say much, outside of chanting the pack's catchphrase.
Despite this, Dwayne's actually not as mean as you'd expect. When they're not causing trouble, the Great Dane seems to smile more and enjoy hanging out with Hubcap and Gasket. Dwayne's also the least serious of the three, as evident of the time he believed they were going to Adventure Bay for sandwiches, or when he had genuine fun playing with Mayor Humdinger's Kitten Catastrophe Crew in his third appearance. Furthermore, Dwayne's been shown to be the most cautious of the pack, as he'll often try to warn Hubcap of things that might be too dangerous or reckless (predictably, his warnings go ignored). And despite his loyalties, Dwayne will bail out of situations he finds to be "Too ruff-ruff".
While there's no denying he's a bad pup, at his core there seems to be a softer side to him not found in either Hubcap or Gasket.
Dwayne is a Great Dane, having brown fur with tan-colored paws, as well as brown eyes, long drooping ears, and buck teeth. He has a short and somewhat skinny tail, as well as the usual pink paw pads found on most canines in the series. True to his breed, he's also quite tall, which makes him the tallest pup to appear in PAW Patrol thus far.
His main piece of clothing is his dark brown biker jacket. It has ripped sleeves with white tips, a poorly-sewed on patch featuring his pack's logo on the left side of his chest, a single zipped-up pocket on the right, and an unbuttoned top collar with a single grey button. Dark threading can be seen around any of the jacket's seams. Underneath all of this, he wears a pale yellow shirt.
Alongside his jacket, Dwayne also wears fingerless gloves on his front paws, which shares the same color. Most of the time, he's also seen wearing a dark grey biker helmet, which features a chin strap, three grey spikes on top, and black-rimmed goggles (the latter of which also has a strap that matches the color of the jacket, albeit with light threading instead). On his back is a pup-pack, which is dark blue, has more spikes (two), and a black tire skid mark graphic. Like the other members of the pack, his also has a claw arm.
Unlike most canines in the series, Dwayne, as well as Hubcap and Gasket, lack pup-tags due to them being strays.
Here is a gallery of Dwayne's attires throughout the series.
Dwayne's pup-pack includes a gripper claw just like Hubcap's. He uses it to grab things.
Dwayne is often seen driving the Ruff-Ruff Pack's main vehicle; a two-wheeled "Cruiser" motorcycle. It is equipped with a one-wheeled sidecar on the right side, which is usually reserved for Hubcap. The pack's logo is featured on both sides. It is also equipped with a pincer arm on the back, similar to the one Rocky uses with his pup pack, only larger. The vehicle, itself has a somewhat dirty and unkempt appearance.