ok if they got taken out of the picture in the 2nd chapter they were in then why have them in at all ? unless someone else picks up the information from oujirou's phone his comeback didn't really matter
so ... because pucci died before he gained MIH from the original timeline the universe reset itself once again and it created this alternative universe ? , that's what i think the ending is traying to say
well tbh the very first momment we saw that there was a connection from the past with fuutarou and the sisters i started becoming wary of that plot point because it felt like unnecessary weight for fuutarou to carry , i would prefer if they didn't have any past connections as kids that tied them...
ok at first i wasn't a big fan of nino but now because of her uncontrollable thirst she is the very last line of defence at this point which makes the meme at the end really funny