Swordsmiths are the backbone of the Demon Slayer Corps; without them, it wouldn't be possible to slay demons. For they are the one who meticulously crafts the Nichirin Swords slayers use.

They have secluded themselves, hidden somewhere no demon could locate...

The Swordsmith Village.

Tucked away within one of its humble shacks is Hotaru; he donned the Hyottoko Mask, a well-known trademark for the smiths.

"..." Not a single word escaped him, with only the sound of a sword smoothly gliding against the whetstone.

He honed and sharpened a sword. His complete focus and concentration on the task suggested that even death could not distract him.