Webdespite his fearsome reputation among slayers and demons alike, muzan had an illness that almost took his life in demon slayer, resulting in his intense fear of.
Webthe mist breathing (霞 (かすみ) の 呼 (こ) 吸 (きゅう) , kasumi no kokyū?) is a breathing style derived from the wind breathing currently known to be utilized by the mist.