Really he should leave her for her sake. Holding on to and depending on another person this much after they’ve died is pretty unhealthy. Of course there’s going to be a mourning period, but ideally we should be able to move on and enjoy life without that person in it. She’s very unstable (which I guess she always was) and the mc so easily succumbing doesn’t help that. That said, I’m pretty sure she’ll crack full on revival magic before she has to grow up and deal with the consequences of life