Breathing Styles are swordsmanship styles practiced and taught by the Demon Slayer Corp. They are capable of making their users fight on par with Demons, and they are generally used with Nichirin Weapons to slay/defeat demons, with a few exceptions. This book may contain fan-made Breathing Styles and some extra Forms from the fanon wiki website. The information that I will be only following is the Anime [Sorry manga readers] I don't own Demon Slayer: Kimetsu no Yaiba all rights belong to their right full owners.