Karkat Vantas is the troll protagonist of Homestuck; he's 6 sweeps old as of the beginning of Act 5, and, as with John Egbert, is the catalyst for most of the main events within the story. He's the Knight of Blood, and his land is the Land of Pulse and Haze. He sounds like a normal 13 year old boy, really. As with the other ten trolls, give your own spin on their voices!