Flanderization
tvtropes.org
tvtropes.org
The only character this doesn't seem to happen to is Rachel. She starts out as a naive barbie and she graduly matures into a career woman who makes her own decisions (she's also naive and barbie-ish but it no longer consumes all her lines). Reverse Flanders?
The first drawings were regular drawing of a pencil, but as time went on, you'd get pencils with purple lead instead of black lead, then circular pencils, until it just devolved into Jackson Pollock and beyond.
The thing is that you have to try to try to change the character so it isn't a repeat of the week before, so over time, it all morphs out beyond all recognition.
This is exactly what is happening in politics. Each new right and left news person has to go further to the right and left in order to differentiate themselves from the other guys, and it keeps going farther to extremes.
You could also make an argument for something called Urkelization, for when a bit character ends up taking over an entire show and it reforms itself around him.
https://tvtropes.org/pmwiki/pmwiki.php/Main/BreakoutCharacte...
Urkel's in there, but there are earlier precedents, in particular The Fonz from Happy Days.
“What's a writer to do when a minor character that they created for a show suddenly becomes much more popular than the other members of the cast? Why, re-write them as a main character, of course! This is that character[…]other characters in the cast might be Demoted to Extra[2] due to their reduced roles and screentime[…]the popularity of the character has to have influenced the direction of the narrative and put them into a major role, or led to the creation of new content specifically for them.”
I’d say there’s also shades of Spotlight-Stealing Squad[3].
[1] https://tvtropes.org/pmwiki/pmwiki.php/Main/BreakoutCharacte...
[2] https://tvtropes.org/pmwiki/pmwiki.php/Main/DemotedToExtra
[3] https://tvtropes.org/pmwiki/pmwiki.php/Main/SpotlightStealin...
Flanderization - https://news.ycombinator.com/item?id=32775119 - Sept 2022 (131 comments)
Flanderization - https://news.ycombinator.com/item?id=25450878 - Dec 2020 (234 comments)
Highly subjective opinion incoming!
By season 3, the characters on the BBC show Sherlock had become caricatures of their season 1 selves. Though maybe it doesn't help that the characterisation was always a bit over the top anyway...
Friends who you get to know, who gradually reveal things you only suspected as full fledged characteristics.
(sort of like, your neighbor who seems frustrated finally comes out and says that he does in fact hate it when people are on his lawn)