"Whenever you ever get a sibling, the one thing that will happen for sure is conflict. Both of you will fight over serious and silly issues. Next thing you know, comparisons will be made and you become angrier. It can get much worse if you're a twin. The Okumura brothers, Rin and Yukio, both go through this phase during their young lives in Kazue Kato's Blue Exorcist. While walking similar yet different paths, the tense relationship between the two makes you wonder how much rougher it is being a twin, compared to just being a regular sibling."