Rengoku and Uzui: singing "LALALA"

Gyomei: praying

Mitsuri: eating the food obanai gave her "Om nom nom."

Sanemi: getting annoyed by everyone, angry Chihuahua noises-

Giyuu: eating ramen "slurp slurp..."

Shinobu: bullying giyuu "You have no friends, go talk to people."

Muichiro: Staring at the clouds "hmm..."

Obanai: petting his snake "I love my snake."

Tanjiro: in a coma, because bro's injured after every mission "ZzZz..."

Zenitsu: Chasing after Nezuko "NEZUKKKOOO-CCHHAANNNN!!"

Nezuko: running for her life "Mm! Mm!"

Inosuke: eating with Mitsuri because he hungry, aggressive boar eating noises