Tanjiro encounters Mist Hashira Muichiro Tokito and Kotetsu, a boy from the village, arguing. Muichiro is demanding that a "certain key" be handed over to him from Kotetsu. Being unable to look on in silence, Tanjiro intervenes to speak on behalf of Kotetsu, however Muichiro refuses to listen. According to Kotetsu, the key is used to operate a battle-type Mechanical Doll, Yoriichi Type Zero, that mimics the movement of a certain real-life swordsman...
One strike with all my might!
!ضربة واحدة بكلّ قوّتي
Mit voller Kraft!
un golpe con todo mi ser!
Será mi mejor golpe.
J’y mets toute ma force !
पूरी शक्ति से बस एक वार!
Metterò tutta la mia forza
in questo singolo colpo!
Um golpe com toda a força!
Удар всем телом!