you mean characters with the goody two shoes personality? that goes for so many characters like most female characters from the Final Fantasy franchise (like Aerith and Yuna) and most Disney princesses (like Cinderella and Snow White)...
I find this personality to be a bit cliche, predictable and boring tbh but I do love some characters with that personality, Serena is probably my favorite female from Pokemon and Yuna is my second favorite female ff character after Lightning.
I don't think Luigi fits into this tbh, but then again I'm not sure I understand this "cinnamon roll" thing all that much so..
I'm mixed on this term b/c I love calling cute characters cinnamon rolls but I hate when people use cinnamon roll as a replacement for having an actual personality and flaws! *cough cough* Steven Always-The-Moral-Highground Universe *cough cough*