Homestuck - Fan Classpect Witch of Ground
A witch of Ground is one who actively manipulates Ground or manipulates with Ground.
So like I said before like the earth benders from avatar or maybe gaara from naruto with his sand manipulation. This also mens they can control the movement of their planet's tectonic plates in order to generate natural disasters like earthquakes or tsunamis. However due to this connection to ground and there planet Ground players replace the Space players of the session in order to make things fair and playable, one could say they are connected to all planets so that's why they take over making the new universe full of planets.
Manipulating through/with ground means manipulating through the earth or manipulating through disasters. This leads me to believe that they can cause disasters that make people do what they want or maybe they threaten their enemies with being buried alive to get them to comply. It could also mean that they can make plants grow and create water/streams through their manipulation of ground.
With the combination of being stubborn and being a rebel this leads me to believe that witches of ground are a lot like hope player's personality wise as they believe in something and refuse to listen to any other point of view about the matter. They would be grouchy and quiet around a lot of people yet open and friendly around people they trust. They can be aggressive when they need to be especially when there friends are threatened. They tend to jump to conclusions most of the time without spending time on thinking about what’s going on. These players would most likely prefer fighting with some form of outrageously big weapon, for example a giant scythe or a ballista crossbow.
The challenge of a witch of ground is to lighten up and smell the roses. They need to realize that there is a time and a place to manipulate their aspect and to not just do it willy nilly. If a witch of ground truly wishes to master their title they must accept that the world has to follow certain rules whether they like it or not.