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...
There is a girl in the Demon Slayer Corps...
...هناك فتاة في فيلق قتلة الشّياطين
Auch unter uns gibt es jemanden,
También tenemos a alguien versada
en fisiología demoníaca y farmacia.
Entre los cazadores hay una experta
en cuerpos demoníacos y medicina.
Parmi les pourfendeurs,
Tra i cacciatori di demoni
Há uma garota no Esquadrão 
de Exterminadores...
Среди истребителей есть человек,
сведущий в действии трав на демонов.
ทางหน่วยพิฆาตอสูรเอง...