This is the infinity castle! you are tsukime and you use sky breathing! so you and the hashira's are falling into the infinity castle! CHARACTERS: sanemi muichiro genya tanjiro giyuu gyomei obanai mitsuri shinobu DEMONS(UPPERMOONS) kokushibo douma akaza nakime and also muzan Kamaboko squad(only in the infinity castle): tanjiro inosuke kanao genya Side characters: murata and the slayers