You should not be reading this page if you have not played the game, or at the very least read through the main entry.
Ai-chan is Charlotte
At least in the bad ending. I mean, c'mon. Terminal illness, dreamlike world, all the sweets one ever could want, but not the one food she really wants... All the WMG about Charlotte having been a cancer patient... Maybe the good end is a timeline after Mado-kamisama removed the concept of witches from reality. I mean, dead people don't come back, but what if it is a world where that death did not happen?