Karkat Vantas

Karkat Vantas is a mutant blooded troll and one of the Alternian trolls who created Earth's universe. He is one of the main characters in Homestuck. His Trollian handle is carcinoGeneticist. His sign is Cancer, Sign of the Signless, which has a Prospit sway and is bound to the Blood aspect. This sign refers to his ancestor and his method of execution. It's technically considered a sign of the lime caste, but actually "transcends the Sign Class Spectrum altogether". He was a member of the Red Team.