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...
I could smell this shimmering stone
even underwater.
.كنتُ قادرًا على شمّ حجر برّاق حتّى تحت الماء
esa piedra brillante
olía incluso en el agua.
même dans l’eau,
la pierre dégageait une odeur.
मैं पानी के अंदर भी
उस चमकीले पत्थर को सूँघ सकता था।
è che quella pietra brillante
Eu poderia sentir o cheiro dessa pedra 
brilhante mesmo debaixo d'água.