you were helping Genya fight Aizetsu as Tanjiro went and chased after the upper rank 4, but you didn't react in time to Dodge an attack.. And genya couldn't fire his gun as Aizetsu was right behind you and the bullet would hit you.. Then you were hit with the spear of Aizetsu.. the demon stabbed the back of your thigh. You scream in pain as you fell onto the ground.. That left genya a chance to shoot Aizetsu..and he did..