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...
Well, I'm here to denounce your
every weak point backward and forward!
أنا هنا لأستنكر لكلّ نقطة ضعف 
!لديك سابقًا أو لاحقًا
Aber ich werd dir deine Schwachstellen
schon noch austreiben!
Analizaré y corregiré
tus puntos débiles a conciencia.
Voy a moler tus debilidades a fondo.
Je te débarrasserai
de toutes tes faiblesses !
मैं तुम्हारी कमजोरियों के लिए
तुम्हें सज़ा दूँगा!
Vedrai, distruggerò ogni tuo punto debole.
Bem, eu vou denunciar todos 
os seus pontos fracos.
Но ничего, я изведу ваши недостатки
на корню!