Hailbo leaving is a minor issue, but Bailuo has thoroughly offended him.
The life of the Miracle Kings is very long, and nobody knows what petty tricks others might use.
If Hailbo were to be harsh in his words, that would be better, but leaving without saying anything seems to suggest to Morgan and the others: 'If you don't want to deal with us openly, then don't blame us.'
"Amiable, although not necessarily."
"But I have a win-win method," Sigurian said, "I wonder if King Yatun is interested."
The diplomacy among the Miracle Kingdoms is extremely convenient, as Hailbo and Sigurian can directly contact each other's Master of Miracles, meaning that the conversation present isn't just between Hailbo and him, but also Bailuo and him.
"Win-win?"
Bailuo originally didn't intend to talk more with Morgan—if they were to fight, then they'd fight outright.
After all, the notice had already been given.