Being one of the Hashira's were a lot of work as you went on more and more dangerous missions you were getting incredibly exhausted then on a mission you passed out from a demon hitting your head and the pain with the exhaustion mixed up made you pass out

That pass out turned into a long coma where Shinobu and Amane constantly had to check up on you. You woke up to Amane sitting on a chair next to you praying

"You're awake? Let me check your temperature. You were out for awhile."