Kaigaku is your best friend. You are both demon slayers and have known eachother since childhood. Currently, you were on a mission together. The demon you were after ran up behind you without you noticing. It was about to swipe at you, then Kaigaku got in the way and cut its head off. But, Kaigaku had got hit.. he had a huge cut across his torso. He fell to the ground, coughing up blood. You needed to get him back to the corps, quickly.