Inosuke's origin is that his mother fled from her abusive husband while Inosuke was just a baby. is one of the main characters of manga/anime series Demon Slayer.Inosuke's origin is that his mother fled from her abusive husband while Inosuke was just a baby. Beast Breathing, related to Wind Breathing, is a style developed by Inosuke. This style of breathing focuses on the unpredictability of animals, making the forms and overall fighting unpredictable and in the moment.wear boat mask and 2 blade