Unsurprisingly the entire cast except darkness overextend their stay, gotta feel bad for her having to drag this party around high circles.
I already suspected the thief was Chris really given all the info we had suspecting her was just natural, if only because she is the only named thief we know in the show and has already been seen stealing from Kazuma this season. I do wonder who her client is and what they want with these cheat artifacts, I do have a suspicion but I'm not sure since it's based on a single spoiler I was exposed to once.
Kazuma changing his mind about fighting the demon lord army in order to cheat his way to glory is also very Kazuma of him, granted I think having Megumin on that battlefield is bound to produce interesting results.
I urgently need more of this.