As far as Mihawk was concerned, being asked to look after this prince who'd been exiled from his country was something he wanted no part of.
Cavendish: Why should I have someone like this watching over me? I don't care if he's a senior from my own country!
Readers, don't you think Mihawk's hat looks a lot like Cavendish's? And the fashion in the Kingdom of Bourgeois is pretty similar, too! Even the glasses on his second personality are about the same!