The Forge would have been the perfect opportunity to make Wortox an unlockable character

[Demon874]

Nah, after the disappointment of Winona, but it could be awesome if they added Wortox 

[Mario384]

14 hours ago, Sinister_Fang said:

Magic exists in this world. A better question would be how do demons and witches not fit? 

Most characters don't have much of a backstory anyway, so Klei could throw in just about anything and it wouldn't effect the lore very much. With all the world hopping going on in the story right now, any out of place character could be explained away with "They came from a different world".

Yeah, but the thing is, outside of the realm of 'them' which we play in, the only magic we see in the real realm is dark magic from the codex umbra.  No confirmation of any other magic, and including too much of it might make the story feel cheesier.  They could pull a Webber (He's a demon or she's a witch in this realm because X), but I doubt they're going to be added.

 

14 hours ago, JellyUltra said:

The game even already has demons, Krampus and Klaus. Who Wortox actually shares a lot of design choices with.

Red skin, horns, facial hair.

Demons who only exist in the realm of "them", who we can assume exist because Maxwell created them.  Every playable character's origin, as we know of, starts outside of the DS world, where these demons don't exist (as far as we know).