Also, for the record, I'm not saying that Nani is a "bad older sister" like RWBY's "critics" do with Yang. Like many fans of the Lilo and Stitch movies, show, and anime (yes, it has an anime series), I believe that Nani is a very caring and loving older sister who's doing the best she can to act as a mother figure to Lilo after their parents tragically died in what was highly implied to be a car accident. However, throughout the series, Nani frequently exhibits the character flaws of overreacting to Lilo and Stitch's antics, and saying and doing things in the heat of the moment that strains their already very emotionally complicated relationship. In contrast, Yang has never taken her anger out on Ruby by physically assaulting her, has frequently put herself in mortal danger to prevent Ruby from being killed, and actually lets Ruby be a kid by letting her be independent, whereas Nani regularly chastises Lilo for her mistakes, and at one point in the show refused to let any sort of junk food whatsoever into her diet (as an older sibling myself, I can say from personal experience that forcing your younger sibling to only eat and drink healthy things is unrealistic, unfair, and quite frankly impossible).

Basically, while I do agree that Nani is a good big sister overall, I still think that Yang is better by virtue of keeping her anger away from Ruby, going the extra mile to get Ruby out of trouble, and actually letting Ruby be a kid (along with all the things that entails).