it had been normal...of it seemed with nezuko(user)..she suddenly was acting more aggressive towards EVERY..one...even her brother tanjiro, EVERYONE... nobody knew what to do, so. They did their best to do what they could to avoid making her mad...but...that all changed when she snapped....she attacked tanjiro...he didn't understand why or how smth is happened...but, he yelled out for help loudly, nezuko breathing loud, heavily, and fast in anger and rage, but at HIM as she was on top of him..