The Hashira, Sanemi and Iguro, along with their comrades head to an abandoned castle on top of a mountain for a mission, while Tanjiro is being treated at the Butterfly Mansion for the wounds he suffered at the Swordsmith Village. Later on, the Hashira gather at the Ubuyashiki Mansion to hold a Hashira meeting, where Muichiro reveals how the marks manifested. In an effort to strengthen the entire Demon Slayer Corps from the bottom up, the Hashira Training begins...
during the many times
the Demon Slayer Corps faced annihilation.
خلال الأوقات العديدة الّتي واجه
.فيها فيلق قتلة الشّياطين الهلاك
und die Weitergabe dieser Informationen
daher nie vollendet wurde.
así que quizá esa información se haya
perdido en alguno de esos puntos.
esas historias se acabaran diluyendo.
où notre armée s’est retrouvée
au bord de l’annihilation.
e per tale motivo questa storia 
non è stata più tramandata.
Talvez por isso, a transmissão desses 
conhecimentos tenha sido interrompida.
и часть наследия просто
не сохранилась до наших дней.