Magman

Filing under demons, because that's the closest match for him I can find here - but I don't see him as a demon. More of an elemental spirit, a force of nature - in this case, anchored to a home volcano. Inside of his mountain he is at his strongest, a force not to be bothered or easily reckoned with. The farther away he goes, the weaker - and colder - he will become. But he will rarely bother humans, provided you leave him be.

Not certain about some of the shading - worried he may be a bit flat in places due to the colors being so similar, but wanted to keep the heat-glow prevalent rather than adding in much more black shadow.

Fine-tipped Sharpies and Prismacolor illustration markers, initial outline sketch in ballpoint.

(Choosing to use him for the Fire theme because of the amount of time that went into him, although I'd initially planned on saving that slot for a request - can try to fit the request into another theme?)