who is a troll
Trolls are a humanoid race of aliens in the web comic Homestuck from the planet Alternia, which exists in a separate universe. They were introduced at first as a group of twelve internet trolls, who often bothered the kids on Pesterchum before being revealed as literal trolls. These particular trolls are approximately the same age as the kids and are the protagonists of Hivebent, which is the first half of Act 5.