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...
but since I'm no good with swords
or Mechanical Dolls...
...لكن بما أنّي لا أفقه في السّيوف أو الدّمى الميكانيكيّة
hab ich weder Talent zum Schwertschmieden
noch zum Puppenbau …
pero no tengo talento ni para la forja
ni para los mecanismos.
no tengo talento ni con espadas
ni con autómatas.
mais je n’arrive même pas
à forger un sabre.
पर न तो मैं तलवार बनाने में माहिर हूँ
और न ही मशीनी पुतला बनाने में।
ma non ho alcun talento,
Mas já que eu não tenho talento 
para espadas ou bonecos mecânicos...
но ни ковка,
ни кукольное дело мне не даются…