Karkat Vantas, also known by his Trollian handle carcinoGeneticist, is one of the trolls and one of the main characters in Homestuck. His sign is Cancer, the Sign of the Signless. Karkat uses rich and imaginative language in his particular fashion  (e.g. YOU ARE SUCH AN IGNORAMUS I COULD SHIT MILES OF RAGE SNAKE TO CHOKE YOU TO DEATH), but not to the extent of a typing quirk beyond his usage of all-capital letters. Karkat is a very crabby troll, in more ways than one. Into rom-coms, apparently?