IQ’s second (but by no means the last) season wraps up with two parallel performances: first, that of the school play Cinderella, to which Rem contributes a…shall we say unique version of Cinderella, who exploits the masochism of one of her stepsisters, derides the homebrew pumpkin carriage as “pathetic” (probably because Subaru is part of it), can’t help but ruefully laugh during her glow-up, and kisses her sister.
As that farce unfolds, the “Battle of Maidens” plays out in the schoolyard, with the all-female defense force all contributing their unique talents to keep Destroyer from ruining the play (and likely the school buildings as well). Raphtalia and Filo only need to hear the first few words of Reinhard van Astrea’s motivational speech (which he also gave during the giant whale battle in Re:Zero) to join in.
Aqua actually ends up scoring the coup-de-grace with a God Blow, echoing a similar battle in KonoSuba. As the episode flips from the battle to the play, it employs clever transitions that tie the two performances together. With a strong finale, Isekai Quartet remains a fun lightweight, pocket-size diversion. I honestly wouldn’t mind if they kept it up indefinitely, continually adding characters from popular isekai anime.