I don't get it, wasn't the nihon tribe supposed to be natives to that world, that merely descended from reincarnators? But these are quite clearly beyond merely that, seeing as they additionally have more skills than a real reincarnator, dislike the world instead of the location, and a bunch of other stuff that can't just be chalked up to "lingo learned from ancestors".
That is an actually concerning person to be around.
Yeah. Had he not been like that, I think she should have tried to get into contact with those reincarnators to at least touch base, even if they do not join up together.