@Norainhere
I've never read the novels. That comment was based on my headcanon after episode 10. I was pleasantly surprised that my headcanon turned out to be canon in the last episode.
So, Miho, Maho, and Erika have known each other for 4 years at least; much longer than Miho's time in Ooarai. Very interesting.
I hope this fact can inspire artists to make more MihoEri, MahoEri, or even MihoMahoEri fanarts/doujins.