Linoge is NOT DEFINATLY a demon 

hi there

Storm of the century is one of my favourite movie so I did some research a few years ago about the character Legion. He is a demon from hell ( as describe in the bible ) but if I'm not mistaken, he should be a wizzard according to the movie. 

Hint in the movie:

1) he hissed in the back of Mike's truck
2) the eyes: once black, then glowing red
3) the silver walking cane with a wolf head (wolf, an animal often associate with wizzards)

From the clues above, I reckon he's more of a wizzard then a demon.