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...
The hierarchy system started
after this sword was forged, I'm told,
قيل لي أنّ النّظام الهرميّ
،أتى بعد أن دُقّ هذا السّيف
Teufelsvernichter
Después de la época de esta espada,
comenzó el sistema de rangos.
El sistema de clases comenzó
posteriormente a esa espada.
La hiérarchie des pourfendeurs
a été instaurée par la suite,
Distruzione dei demoni malvagi
Me disseram que o sistema de hierarquia 
começou depois que esta espada foi forjada.
Похоже, его создали
ещё до введения ранговой системы,