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Henshin4Life
Since: Oct, 2018
MetaFour
MOD
(Old Master)
2022-05-15 09:04:29
Possibly Rant Inducing Slight if what sets the character off is comparatively minor.
Traveler123
Since: Mar, 2018
2022-05-15 09:12:00
Related to Berserk Button, perhaps? If the character is calm and collected but has a well-known trigger that sets them off?
Scorpion451
(Edited uphill both ways)

Is there name for that trope where a calm, collected or serious character becomes chaotic or goes totally crazy for an episode?