averageguy17 said:
Hmm... Well, a breakdown is a bad thing in the games, as it's when they finally crack, correct?

An easy one would be Awake-san as she would finally give in to the alluring power of hypnosis.
breakdown is when the culprit realizes they cant weasel their way out of their situation, and they promptly respond by FLIPPING THE FUCK OUT, their personality traits going into overdrive

so for awake-san the accurate thing would be her doing godots coffeemug throw, turned up to eleven where she's throwing cups of joe at everyone, screaming anti-hypnosis propaganda