"[...] a saint dressed in rustic robes stood by a cave so deep you could barely see into it. He was haggered and emacisted, totally without flesh. Nothing but skin and bones, that's all there was too him, so that looking at him you wondered where his soul could possibly be hiding. A single horn protruded from his forehead. His appearance was infinitely frightening He hobbled out like a shadow hunched over his stick, a flask in his hand and a misshapen grin on his face." (How the One Horned Immortal Carried a Woman From the Mountains to the Palace)
The original story of the One Horned Man actually came from India and made its way into Japan with numerous changes to the story itself on the way.
Of course, i made him a little cuter than his interpretation, with only the flask and the stick being the defining features. As well as the horn and the slight hunch...He looks kind of like a mystic fighting teacher XD