Xingqiu is the polite and erudite second son of the wealthy Feiyun Commerce Guild manager. He is also a popular author under a pseudonym. He also can’t/won’t tell his family about most of his life. He lies about the reasons for his travels to make them palatable to his family.

Ok, so I hope you are getting the drift- that Hydro vision users are never what they appear. So Furina being portrayed as annoying/exasperating feels completely like that is only her public persona. We saw snippets of her being thoughtful in the archon quest- those were indicators of her real self.