That's a pretty cool rule/creature to add in a game group!
I'm not sure about the "Obey" concept, maybe it should be more lire an "answer/help/comply"? Since the character is asking a favor rather as giving an order? This way, it could better evoke creatures such as Jinns... And so make things funny because Jinns are not obeying, they're complying on their own tricky ways 😁
(Anyways, these are détails! I love your concept!)