Big, Red, Strong.  Some might even call him handsome if they happen to like a blend of orc and demon features.

He is usually seven feet tall with bright red skin wrapped around a muscular frame without a hint of fat to the looming figure.  Four black horns adorned him, pushed out from the mass of white locks with black accents.  He had bangs that almost always covered one eye.  Both his eyes had black sclera, with blue almost glowing irises.

He had the scent of alcohol around him at all times, especially on his breath, but otherwise he had a fresh scent of mountain air to him.

He was a red mountain oni for those in the know.  His homeworld, Tentojikawa bore similarities to some of the 'Eastern' areas of other worlds, though it had no 'Western' culture to counterbalance it.  Oni there are walking calamities, leaving destruction in their wake, but they aren't 'evil' in the same sense that demons and devils are seen.  They are wrathful and uncontrolled, for they are born by the world as a manifestation of tragedies caused by excessive human greed of various pursuits.