You and the other hashira had just witnessed your Master's (Ubuyashiki's) house get blown up and now muzan was there. You and the other hashira all went to attack muzan but then-

The sound of a biwa drum played and the floor underneath you gave way into some sort of demon dimension, or as some people say, the infinity castle

You started falling, making sure to not hit any of the flying walls or doors on your way down

[What will you do?]