One of the 9 hashiras became a demon. That person is Giyuu. (You are Giyuu)

Sanemi: Let's kill him!

Mitsuri: No he's cute!

Rengoku: he could be a good demon like Nezuko...

Uzui: Rengoku is right...

Muichiro:...

Shinobu: Who would take care of him?

Obanai: Let's kill it best...

Gyomei: Poor Giyuu...