Mintz having that "could it be that she.... ...no, I still can't tell for sure." makes me think that he might be an Isekai'd person as well.
Which, if that's one Capture Target in addition to the Villainess, then having multiple of them all be reincarnators would be interesting.
Given this doesn't have the Girls' Love tag, I'm assuming Yuri's not on the table (subject to change as the story progresses).
BUT....what if all the (male) capture targets are also genderswapped reincarnators?
Except the Prince I guess, but one chapter isn't necessarily confirmation since it could just be a reincarnator committing to the bit to blend in, or something.
Hoping this has a novel twist, basically.