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...
He's only around my age...
...إنّه في مثل سنّي تقريبًا
Es casi de mi misma edad,
Y tiene más o menos mi edad.
Il a à peu près mon âge,
Ha più o meno la mia stessa età
Ele parece ter a mesma idade que eu.
Хотя мы, считай, ровесники.