The anime is messing up my memory regarding this manga.😅
Anyway, has it ever been confirmed which flags Maria has actually set in this time line? A lot of Katarina's doom flags correlate with which ones Maria has set, logically that would be the first thing one investigates. But, well, this is Bakarina we're talking about.
Wonder how she'll solve this family problem. The original method probably won't work. Whatever it is, it's probably just as gung ho.