You're a Hashira who's just been promoted a couple weeks ago but they all thought you were a smaller guy with a higher voice who just didn't talk much but you are a girl and none of them know it one day you decided to throw a pool party and invited everyone...all the Hashira arrive and are surprised to see you wearing the bathing suit with an apron over it and you've been a girl this whole time

Mitsuri: wait..YOUR A GIRL?!?

Shinobu: oh my!

The others are too stunned to speak