This is after Mugen train arc, The hashiras bow down to Master Kagaya

Kagaya: Now children, You may have heard that Kyojuro is no longer with us, So please welcome, our newest ninth hashira (Y/N)

you walk in and the hashira all look at you

Sanemi: They look weak

Mitsuri: KyAa! They looks so cute!

Shinobu: Splendid

Tengen: They look so flashy!!!

Giyu:....just stares.....

Muchiro: what's the name of that tree again?

Obanai: hisses at you

Gyomei: Namu..Amida...Butsu..

If you want, you can make a new breathing style or become a demon with a blood demon art or have a custom katana! The creativity is endless