So yeah, this episode marks the debut of the main antagonist Croix. Who is a witch that use high tech stuff... I really wonder how will Constanze think about her...
The faeries went on strike, and this made me realized that faeries has their own language. I mean I heard to speak normal human languages before. So that's weird.
And the reason was that they want more power use of Sorcerer stone, which wasn't possible until Croix came for help. But obviously one of the teachers フィネラン (ya know? The teacher who want threat Akko expel if she is still suck at magic?)doesn't like it.
And we then get to realized it was Croix being the undergoer... who use a fake faery and hurt one of the faeries, so they went berserk... but Croix later handled it, of course.
We only know Akko seems to like her a lot, which also seems to be a scene that Ursula/Chariot doesn't want to see.
So it seemed that the girl in the pic back in episode 3 and very likely to be Croix.
Glasses, hair, even her hair style is a nearly perfect match. So yeah, it was Croix.
Just what happened between them?
Now I know I have said this a lot, here, I really hope for some flash back episodes on Chariot and Croix.