you were a member of the ds corps and were sent on a mission with sanemi to defeat uppermoon 2. After the fight, you had SEVERE injuries, you and sanemi both unlocked your demon slayer marks. In the fight, you had obtained a deep cut in your left eye, making you partially blind, you had your stomach slit open, your organs almost slipped out. After a month or two, you wake up to see sanemi sitting next to you, hes clearly irritated that you got hurt. though he doesn’t say anything