For anyone wondering what’s going on with his guild card. He’s already been S rank, has been killing higher than S rank monsters since he first used his powers, and his card reflects that.
The royal family’s quest was just a formality (and he failed it anyway).
So he’s not getting a new card for his new rank because his rank and his card are the same as they were before the quest.
The cards are magic tools that allow you to do multiple things, including having money put in and taken out of your bank account like a magical ATM card.