If you wear a gi/yukata/kimono, make sure to do *left* over right! When I just started cosplaying, sometimes I’d mix it up. Don’t make my mistake! Yukata are worn left over right because the inside of the yukata, similar to a pocket, can carry weapons (knives) or fans. When someone dies, they don’t need weapons anymore, so they are buried right over left.
Almost all anime/game characters wear left over right, even if they’re essentially dead (eg Bleach). The only character I’ve seen wear it the other way is Nora from Noragami, who is dead. There may be other exceptions that I don’t know about, but left over right is standard.