First Flamie's competition was removed by making Bunny Princess the traitor, and then when they introduced the second extra character, she's ugly, being no real competition. Adlet and Flamie are really pushed together by fate! Yet poor Flamie is still highly jealous.

It was pitiful how after all this, the cliffhanger included, Adlet was reduced to uttering yet another accusation based on nothing but a hunch, just like the ones before that first targeted Flamie and then got him all wounded. Until we suddenly got new concrete evidence out of nowhere in the best tradition of deus ex machina. What an annoying arc.

I have a feeling the demons were dealing out a bunch of brave marks to people, both traitors and innocent, to confuse them majorly. I'd guess Adlet's own mark is one of the fakes, like has been suggested before. Funnily enough it's still possible it will protect from the miasma nonetheless. Since the fiends were trying to make human allies, it's plausible they did develop a method to protect their allies from their poisonous atmosphere, and then one of them got the great idea of faking braves.