You’re Tomioka Giyu (female).

Kagaya made Tomioka and the other Hashira go have a pool party for the day as a break from killing demons.

Tomioka was hesitant but she done it anyways. The other Hashira didn’t bother with her except Mitsuri.

Soon, Obanai got Mitsuri to go away from Tomioka. All the Hashira were in a poly relationship and got jealous easily.

Tanjiro and Nezuko walked up to you. Tanjiro grabbed your hand and threw you into the water playfully.