Karkat Vantas

Introduced in Act 3, and currently known only by his/her Pesterchum chumhandle. An incredibly rude individual who trolls Jade, earning him/her a place in her Trollslum. He/she types in light gray. He/she seems to be aware of Jade's activities and of the kids' plans to play a game. He/she also seems to want a different outcome, asking Jade "IS THERE NOTHING I CAN DO TO CHANGE YOUR MIND?" indicating he/she knows what Jade wants to do, and wants her to do something different. Thankfully, she outright denies.

He/she types in all caps and with terrible grammar, typical of an internet troll. He/she also constantly insults others, supporting his/her arguments with empty logic. CG has the ability to pester Jade even though he/she's been blocked and Jade is signed off. This suggests he/she is more intelligent than his/her diction supports.

His/her chumhandle is particularly nefarious sounding, implying genetic engineering and carcinogenic factors. This could suggest that one of his/her interests is intentionally causing cancer. Like others in Jade's Trollslum, his/her name has a zodiac symbol implied - in this case, Cancer the crab. It could be that the members of the Trollslum will be the first individual antagonists to be introduced in Homestuck.

A person using the handle "CarcinoGeneticist" is also present on the MS Paint Adventures forum. He/she acts exactly the same and even types in the same color as the CarcinoGeneticist in Jade's Trollslum, and everyone is certain they are the same person. At the moment, very little has been revealed about him/her.

Since then, however, due to an alarming influx of such Troll accounts, pretending to be the trolls is no longer allowed. CarcinoGeneticist is still present on the forums, but is forbidden from using his trademark font.

'''BE ASSURED. HE IS REALLY PISSED OFF ABOUT THAT PART. ~carcinoGeneticist'''