Muichiro tilts his head

Muichiro: “? Who are you? Tanjiro, Nezuko, and Zenitsu?..”

Genya: “Eh?..”

Mitsuri: “Hello!! Welcome to the Swordsmitch Village Arc!”

Tanjiro: “Thank you, Kanroji-sama!”

Nezuko: “Mmh!! (Thank you!)”

Zenitsu: “Ehhh, thank you?”

Inosuke: “VERY NICE TO MEET YOU!!”