Karkat is a troll. This means he is roughly humanoid, with grey skin and shaggy, coarse black hair that is an intractable mess. He has nubby candy-colored horns, sharp, carnivore teeth and black lips. His pupils are black, with yellow sclera, and there are heavy bags under his eyes at all times. Despite his slightly muppety icons, he does have a nose and (slightly pointed) ears.
He is six sweeps old, the equivalent of 13 human years, and resembles a somewhat scrawny, gawky adolescent, but he's a lot more dangerous than he looks. Despite a humanoid overall appearance, he is not remotely human in his general biology, which is both gross and complicated. He wears the same clothes all the time--a black long-sleeve t-shirt with a grey Cancer symbol and grey cargo pants.
Karkat is incredibly angry, just about all the time, with surprisingly good reasons; although his anger is often misdirected, he is not really as big an asshole as he seems. He's just ornery. His voice is LOUD AND HOARSE, but he isn't actually shouting all the time. His trolltag is carcinoGeneticist.
Karkat is from Homestuck, and is the property of Andrew Hussie. He appears here solely for the purpose of role-playing in milliways_bar, from which no profit whatsoever is being made.