edit: wow this is like text book mary sue, i guess most of these are tho
Nah, not really. This is like One-Punch Man: they are ironically given everything that
some other protagonist could ever want or need to accomplish that other protagonist's goal, but it's irrelevant or an outright obstacle to
their comically different goal. Saitama wants an actual challenge, and his overwhelming power level is what obstructs that goal. This woman (I'll call her AA, don't remember the name RN) wants a simple life with no big demands, and while she
does get that for 300 years, we've skipped over all that and now the airheaded girl from the Guild could wreck AA's perfect life with a little careless boasting -- boasting you can tell she's pretty eager to do.
Isekai stories, as a genre,
are filled with Mary Sues who act like they're awesome people because they got gifted with the cheat codes, but this doesn't seem like it's going to follow that mode.