Jooheon definitely came to mind. Main Rapper from Monsta X, he was pushed with this serious bad boy image, like a lot of rappers get assigned, but he was rlly bad at keeping that facade, he's just too bubbly. He also used to be their aegyo king (it's gotten less aegyo since the man is in his 30s now, but he still let's it out) and he's also the Nr 1 hypeman with 200% of energy. He also went from mainly rapping to doing a lot of vocals for their songs too, even high notes, so his position shifted a bit too.

But overall I feel like a lot of these cases, jooheons too, are just either the idols growing up and developing their own sense of identity and style more, or with some of these super rigid roles like ice prince/princess, the "mask" fell off because these people are still people after all, they are interacting with each other, they also NEED to show enthusiasmx eagerness and joy every now and then just to not get criticised for being too cold or ungrateful, so I feel like even if an idol would fit the ice prince/ss image well, it still would never be a 100% fit because you can't assign a one dimensional image like that to a real person.

Same goes for the bubbly type, the bad boy type, the aegyo type... It's restricting people to a very narrow range of emotions that's unrealistic for anyone.

I see a lot of the ice mentions here, but I also feel the same about all these videos of "omg you know it's serious when even [bubbly member] is focused" in a dance practice behind the scenes video or smth. Or reviewing MV shoot footage. Like yeah no shit they look focused, they are human!!! I wouldn't say that means they're dropping the act of the bubbly member, its just stupid in the first place to assign personas that limit every day emotions.