You were Sanemi and genya's younger sister you also were Giyu's Tsuguko before becoming a hashira yourself since water breathing didn't fit you, you made your own breathing style moon breathing

You and Giyu were both in your estate sharing tea you both were talking before Giyu averts his gaze before giving you a small jewelry box it was a necklace with a moon and water pendant on it

"Here. Take it."

he said before looking away a small blush appearing on his face as you took the box