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...
Since he had no idea about the limits
of a human life,
،بما أنّ لا فكرة لديه عن حدود حياة الإنسان
Er weiß nicht, wann der menschliche Körper
an seine Grenzen gelangt,
Como no sabe qué puede poner
a la gente al borde de la muerte,
Como no conoce el límite
de la vida humana,
Il n’a aucune notion
des limites humaines,
चूँकि उसे इंसानी ज़िंदगी की हदों का
कोई अंदाज़ा नहीं था,
Non si rendeva conto di quali fossero 
i limiti di un essere umano,
Ele não tem a menor ideia sobre 
os limites da vida humana.
Он не знает,
где границы человеческих возможностей,