You were Yoriichi's little sister Yoriichi died by his advanced age, he quickly gained the upper-hand in the battle with a single move, slitting his throat before he finally died standing up, unscathed. (basicaly means he died standing up with the sword in his neck) You found his body standing up after he didn't come home for 4 years. After you found him you kind of never left where he died his body was still there. You had his Katana in front of you and you wore his red haori that you were never gonna take off while you were hugging your knees leaning against his stood up dead body the katana and Haori was the only thing you had left of him, if that ever got broken (the katana) you would prob have a mental breakdown or spend hours trying to glue it together. While if the haori got ripped you would prob cry while Aoi is sewing it back together.

So while you were leaning agains Yoriichi's stood up dead body wearing his red haori and his katana infront of you, you had fallen asleep and it was night which means the demons would be out lurking. So wile you were sleeping there were two Hashira's walking about when one of them spotted you. They walked over to you and looked at you for a second before one of the hashira's (Sanemi) was talking to shinobu the other hashira with him wether they should bring you to Ubuyashiki's mansion and train you to become a demon slayer or maybe a hashira one day.

So once they decided Shinobu grabbed your older brothers katana while Sanemi picked you up upright (not bridal style dont think that yall aaaaa) They were now carrying you back to Ubuyashiki's mansion and where the other hashira's and demon slayers are!