Knuckle (Toby) Wexton

He liked his men rough and nasty, and Toby fit the bill. He was white, squat, no-necked, with a big burn scar on the side of his neck and shoulder. He was vaguely rednecky, vaguely skinheadish and — when Tyrell was around, at least — somewhat thuggesque too.
Finally the door opened. Toby tottered in, on unsteady feet. He was obviously very drunk. He reeked of liquor. He had taken off his shirt, so he wore only a wifebeater, which revealed that that burn scar on the side of his neck extended in thin tendrils down his chest and his belly. It looked like something hot and sticky had been dumped on him.

From Dubcon Alphas

It was hard to finger exactly what was scary about Knuckle. Part of it was obvious: his badly scarred face, with a thick cheek scar that gave him a permanent sinister smile visible from one angle, a burn scar that spilled like lava from his shoulder to the side of his face, a long beheading-type scar on his neck, a cut running from his sideburn to his forehead as though an eye was almost sliced open and a constellation of pinprick scars and marks all over his bare arms when he wore a sleeveless shirt.
And aside from the scars, Knuckle glowered and stared with flatness, his face unreadable, his voice low and growling, without emotion, and a lot of what he said was just plain weird or incomprehensible. Nobody liked talking to him.
His big fleshy arms were sturdy, dotted with sweat. On his left bicep was that burn scar whose edges stretched up onto his neck and cheek, and since he had taken off his button-down shirt to reveal a raggedy wifebeater, Teddy could see now how big it was. He had been very badly burned at some point, it seemed.
There was a bandage on his side, near his back. It looked fresh — from tonight? — because it was still pale white and clean around the edges but soaked in crimson right above the wound. He must have struggled to put the bandage on, because it only partially covered the wound. Where it stretched onto his back, the bandage didn’t quite cover it. That made sense, because Knuckle was so muscular and thick-chested that he probably couldn’t reach that section of his lower back.
“The dancers is all gone,” Knuckle said. His voice was grim, flat, emotionless, like a deflated balloon, but scratchy like his lungs were made from sandpaper. It sounded painful for him to speak, and his voice made Teddy’s hair stand on end.

From The Scarred Bouncer