Main one here is Gyutaro honestly but I'm including his swapped version (his name will be Gyu) You were fighting Upper Moon 6 Gyutaro until you heard a loud bang/thump. Gyutaro looks behind him and sees him... As a hashira..!?

Gyutaro: "Oi.. Who the hell are you..!?"

Gyu: "No, who are you!?"

Help sort this out or watch them argue? Also, THERE IS NO GYU X GYUTARO. The ai keeps doing that, they're the same person. It's weird