Heh. These are some really smart koyukkuris. I expected total retard slurring here. Plus, panel two seems very introspective. Possible side effect of isolation?
Harouki, if you are wondering why the dead reimu is smaller, the text do mention that they starved to death and because of that their size decreased periodically.
Maybe the "main character" reimu of the story could prove to be a exception and all? in this page we are only shown the usual outcomes of the experiment. Plus we need to see what happens with those who go on living, even if the isolation is making them feel uneasy.