Y/Ns sis vs Y/N!?!

Intro so this is Y/N's sis vs Y/N im sorry i didnt post for months bout ur sister: name: maiko (ur ocs last name or idk) age: 170(she shares uppermoon 2 with douma) her personality: crazy, a maniac, hates humans and u. looks: ur oc's/ looks u guys had the darkest and saddest past so u guys had all the reasons to become a demon but u become a hashira instead bout u: name: anything(name ideas: kamiko, kaikoi, hatsune, kyokro, kyokoi, shiho, yoki, or shiki) Age: whatever(demon or human age) looks: whatever |~S.T.O.R.Y~| so u and ur sister is having a combat(more like a siblings fight next level) and ur about to die and SOMEONE saved u (they can a be hashira a dead person even a bag of mango slices)