Once again Akko is facing doubt about her future so she needs to learn a lesson.
The blue moon is a rare sight and there’s a ghost at the school who only appears during that celestial event. Of course Akko has to go consult her.
While Diana is accessing a book that is rare and you need special permission to open. Both of them are finding out in different ways that they need to use these spells with a wand like Chariot’s to unlock something else. Although Diana is getting more of the big picture while Akko is doing the practical work.
But mostly the lesson is for Akko, she demands to be just like Chariot and the ghost is trying to tell her that she can’t be Chariot because she’s Akko. Like that one quote, “Be yourself, everyone else is taken.”
From the Deck of the Matcha Latte 