I made Zircon and that into demons years ago, it doesn't make sense to keep their demon designs anymore. I'm trying to think of a backstory for them and them being demons isn't making it any easier. :V
This is Zircon's original (original) design...a year or so ago I found the real 1st drawing of Zircon at my grandad's house which was cool. :3 His tails are adorable.