Hot HashiraThe Flame Hashira. It’s a title not easily attained. You can imagine the kind of grueling training he went through. In the Demon Slayers series, fire is one of the more formidable elements, as it shares similarities with the ultimate breathing style, Sun Breathing. If you need an officially licensed Funko POP of your favorite Demon Slayer character, check out this POP! Animation: Demon Slayer – Kyojuro Rengoku Vinyl Figure.