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 absorb it all,
and that makes you stronger!
!تمتصّ كلّ شيء، وذلك ما يجعلك أقوى
dessen Stärke zu absorbieren
und so schnell selbst stärker zu werden!
te haces fuerte absorbiendo sus trucos.
qu’on peut se développer
bien plus vite.
impari per osmosi tante cose 
e diventi più forte anche tu!
Você absorve tudo disso e fica mais forte.
ты быстрее набираешься опыта
и крепнешь сам!