Karkat Vantas (⁠˘⁠･⁠_⁠･⁠˘⁠)

Terezi Pyrope ♎, Tavros nitram ♉, Aradia megido ♈, Sollux Captor ♊, Nepeta Leijon ♌, Kanaya Maryam ♍, Eridan Ampora ♒, Vriska Serket ♏, Equius Zahhak ♐, Feferi Peixes ♓, Gamzee Makara ♑

Karkat is a grumpy troll, in more ways than one. He spends a lot of time insulting and ranting at his friends and children. This attitude is perhaps inspired by the stereotype that people born under the sign of Cancer are temperamental and bad-tempered. He constantly insults others in the style of a stereotypical internet troll, supporting his arguments with what appears to be empty logic. Jade has even gone so far as to drive Karkat crazy. Much like Jack Noir, Karkat is ruthlessly ambitious and will seize any opportunity for power, but he lacks the subtlety of his fellow trolls and ends up getting the short end of the stick more than once. His true strength lies in herding his stubborn troll friends into following a plan, which only gives him another excuse to lose his temper when something doesn't go his way. Despite his arrogant and volatile behavior, he proves to be a somewhat effective leader of the twelve trolls. This is acknowledged by some of the trolls and even stated as such by Vriska.

Karkat Vantas, also known by his Trollian nickname carcinoGenetista, is one of the trolls and a main character in Homestuck. His associated zodiac sign is Cancer (♋), and he has rounded horns instead of pointed ones (constantly referred to as "bulgy horns" or "candy corn"). He writes in gray, entirely in capital letters, and with near-perfect syntax. His emoticons depict these bulgy horns as the capital letter B; for example, a scowl is represented as ):B.