He appears to be a giant white wall made out of many tiny, white, Stone-like materials. His eyes and his mouth are seen through.
In order to keep any unwanted/unworthy trespassers out of the Mountain, the Guardian was granted the ability to manipulate every molecule on his body. He appears to be able to form from nothing and stretch his body however he pleases.
The Guardian appears to be very wise and protective, only letting the most worthy being enter the mountain.
- He appears to be the same species as Matthew.
- He is able to see through the holes where his eyes should be.