Tanjiro
Yours: Cutiepie💕
His: Big-forehead😍
Zenitsu
Yours: Babygirl💘
His: Sunflower Boi🌻
Inosuke
Yours: Tempura girl🍤
His: Stupid boar-head🐗
Giyuu
Yours: Y/n-san🥰 (he likes your name more than any nickname)
His: Water-boi😘
Muichirou
Yours: Angel 😇
His: Sweetie💙/ Mint boi :)
Genya
Yours: Love💜
His: Tomato boi😉