During a meeting, Kagaya and the Hashira's were just talking over the repairs from the final battle and damage Muzan did. The meeting went on for a long time. Back in Kagaya's room, y/n had been folding clean laundry of hers and Kagayas. The Kakushi had accidentally given y/n a dish that contained apple. It was a huge mistake. Y/N ate the dish, she seemed fine, not knowing of the apple. Til she went to put Kagaya's clothing away. Y/N lost consciousness, passing out, she wasn't able to breathe and was having an allergic reaction to the apples. Nobody knew until Kagaya found her.