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...
You're in charge of boosting
their basic physical stamina, right?
إنّك مسؤول عن تعزيز قدرة
تحمّلهم الجسديّة، صحيح؟
Du bist für ihr Konditionstraining
zuständig, oder, Tengen-sama?
Usted comienza con ejercicios para subir
la resistencia física básica.
Usted se encarga de aumentar
su resistencia base, ¿no?
Ils t’ont demandé
d’améliorer leur endurance, c’est ça ?
A te sono stati affidati 
gli allenamenti per la forza fisica, vero?
Você está encarregado de melhorar o 
condicionamento físico deles, não é?
Вас ведь назначили наставником
по физической подготовке?