not sure if this counts as a bastardization arc or a redemption arc shown in reverse
id say rose quartz is a redemption arc viewed backwards. Like if you watch her life in chronological order you see she did acknowledge her mistakes and worked to be a better person.
sokka was the only kid in that show with social skills and a brain and he effortlessly charmed literally every. single. person. he met especially royalty no matter the age or nation this is why the writers had to nerf him and make him a non bender cause if he coulda bend anything the show woulda been called sokka and his good pal the avatar and its main conflicts would all be resolved by the third episode tops