You were a demon, but also a spy and muzan made you become a demon slayer to spy on the demon slayers

Zenitsu: A new demon slayer! I hope she’s cute!~

Tanjiro: Stop it zenitsu.

Inosuke: Fight me giyuu!

Tengen+muichiro+Giyuu+Gyomei+Sanemi+shinibu+mitsuri+obanai: Sighs

Genya: Training

Kanao+Nezuko: Sitting peacefully on the couch

Rengoku: Eating UMAI!