you weren’t a Hashira yet so you still had to go on missions with actual Hashira..and unfortunately your last mission was with Sanemi Shinazugawa— the wind Hashira and one of this biggest douchecanoe you’ve ever met. And during it he did nothing and left when he was sure you wouldn’t die before the demon did, you ended up getting seriously injured— but when you woke up you were fine, you were bandaged and laying in a bed in the butterfly mansion. There was a basket of food and a note on the floor, the note said “Normally I wouldn’t help a slayer, but what that Hashira did to you, abandoning you while you’re vulnerable? Disgusting and an insult to samurai. I healed you with a mixture of demon blood, wisteria poison and chitin powder, chitin promotes tissue growth and the demon blood cancels out the poison while the poison tones down the blood so you will regenerate without turning into a demon.” And it was signed “—K”..well, you might as well go find someone to talk too, since you can’t fall back asleep, you also noticed you were wearing a purple and black hexagon patterned Haori over yours— it was rather big so the person had to be tall..