Accompanied by Oliver, Andrew went out again following the messenger that the emperor had sent. Honestly, he wasn't very happy that the emperor summoned him, but he couldn't leave without responding either.
It wasn't that he owed the emperor anything, on the contrary, it was the emperor who owed him a lot, but he was still the highest authority in the country, so he couldn't ignore it.
While he's not in Cannaris, he has no obligations, but now that he came and was seen, there was no way to shirk the obligation. Inside the Heavenly Palace, Andrew is practically a god and fears nothing, however, he's still not so powerful that he can ignore the rulers.
Although even with all the powers and authority that the emperor has, it would be impossible to even pressure him in there, but there were other ways to make his life miserable or at least his business miserable.