I see it

"I'll do the investigation and if you're worried, you can send people to monitor the knights, Your Highness," Aurora finally said this. 

"But that's…"

"Your Highness, the investigation is still necessary. No one shall insult the Royal Family's name openly and blatantly without paying the price. Besides, it's unreliable to only rely on his words," Louis interrupted Crown Prince Edward's words.

Even though Louis had long known that Crown Prince Edward was stupid, but he felt that he would still be a good king in the future. As for how he came to this conclusions?

Louis was not sure.

But he knew very well that his role was to follow Crown Prince Edward and to assist him. It was the role given to him ever since he was young. 

So if Crown Prince Edward made a mistake, it was up to Louis to clean up the mess afterwards. 

"I…" Crown Prince Edward still wanted to refute but in the end, he stayed silent.