Are we causally avoiding the fact that that in a month the hero managed to get such detailed information about her when he was gathering info on the demon lord?
Hero: Are you the informant?
Informant: Yes, I have heard that the hero was looking into matters of the demon lord.
Hero: That is secondary.
Informant: Secondary you say? what might be the first order of business be then?
Hero: Give me all the info on the Princess's <bunch of good adjectives> maid.
Informant: Aren't you sure the demon lord isn't the first objective.
Hero: I am certain!
Informant: I apologize, but I only have information on the demon lord on hand at the moment. I would have to look into the matter after this.
Hero: how do you not have information on such a lovely maid?
Informant: (This is probably a good business opportunity, but this man is dangerous is he not?)