…because apparently we didn’t have enough AU already so we made another one. The idea is that the Shimada family are descendants of dragons. With the passing of time their power decreased and so their form reduced as well.
Some of them lost all the link to their human parts and become just kirin (who’s like a hooved mini-dragon version), but others are still able able to change form from human to kirin (and those are called Royal Kirin). Humans belive that they bring fortune and fulfill wishes so they hunt them down to make some easy cash, at least by selling them.
I'm sorry, but do you do any Gravity Falls cartoons anymore? They really were perfect each in its own way, but...I think you kinda stopped because of the end of the season...:(