For whatever reason this Knight is dressed for show. Is he returning from battle and got all cleaned up to present himself to Court after a victory? In his finest battle armor to deliver a message to a neighboring kingdom or to win the affections of some fair maiden?
Whatever, there is dissension in this Knight. His horse is facing one direction and he is looking off in another. That horse is facing home and the Knight it seems, doesn't want to return.
I can't figure out what is with that growth out of his helmet. Laurel Leaves for the coming celebration of victory or a cancerous growth because of the disharmony.