Too late for a guess to count, but if Prassenze is the dream thief Five will be very I fucking knew it about it! He was onto her at the start.

Also suspects Contessa (or more likely Hugo on her behalf) stole the herbs, possibly because Firo is a living dream and they’re trying to make it look like she’s asleep somehow. Makes sense! (50/50 on if the conductor is a robot, he’ll get this conspiracy sorted.)