This tree man was either inspired by the Ents in Lord of the Rings, the Sylvans in Dragon Age, or Groot in Guardians of the Galaxy. I can't decide. The face reminds me of Groot, the rest is much more LoTR or DA, in my opinion.
Originally drawn in A5, pencil, during a maths lesson. The scan didn't capture all the detail, but I'm still happy with how it turned out.