In my opinion, the only person who comes back from the past and is not an antagonist is just this woman, so her life is really easy, because from the beginning she is indeed good... She just wants to show that not all nobles are evil, and treat people beneath them like animals.
Usually, everything that enters into a novel story will portray the antagonist character, who will die and must change the contents of the story a lot, but in this story it's not as complicated as that... Just saving one slave and everything goes smoothly without draining energy
In my opinion, the only person who comes back from the past and is not an antagonist is just this woman, so her life is really easy, because from the beginning she is indeed good... She just wants to show that not all nobles are evil, and treat people beneath them like animals.
Usually, everything that enters into a novel story will portray the antagonist character, who will die and must change the contents of the story a lot, but in this story it's not as complicated as that... Just saving one slave and everything goes smoothly without draining energy