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...
Could you have climbed any higher, Kotetsu?
!إنّك بارع جدًّا في تسلّق الأشجاء يا كوتتسو-كُن
Pero si te subiste al árbol
a toda potencia.
Ha usado todas sus fuerzas para subir.
Tu as grimpé
de toutes tes forces !
Você subiu com toda a força, hein, Kotetsu!
Далеко же ты ускакал, Котэцу!