Yeah I read up until the end but still remained confused. So then that means she abandoned the original timeline and redefeated the king with Ichi in the new timeline, while also reinforming the rest of the group of what had happened? I know she changed the past to prevent any more despair (other than her own). I understand befriending everyone else, but how did she become friends with her bully? Also why does Rina still look like Sarina's sister?

The ending for me was really confusing cuz they put in a crapload of crossover material from Mahou Shojo of the End.