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...
Much of the lore surrounding
this mark remains vague.
إنّ الكثير من المعرفة المحيطة
.بهذه العلامة لا يزال غامضًا
Die Überlieferungen ließen viele
Aspekte dieser Male im Unklaren.
los escritos referentes a la marca
están llenos de muchas ambigüedades.
El folclore sobre esas marcas
deja mucho sin aclarar.
il reste de multiples points obscurs
en ce qui concerne ces marques.
la leggenda su di esse
Muito da tradição em volta dessas 
marcas ainda se mantém vaga.
в дошедших до нас преданиях
много белых пятен.