There was just no way that Edward was going to be able to just sit in his room and do nothing while there was a shadow murderer running around, stealing people's hearts and just generally making a mess of things. He knew that the Sora kid would most likely wake up from it once the curse was over, but for the time being everyone had to be on their toes. That was why Edward had taking to patrolling the hallways in Wing A under the guise of going down to the gym. He would have told Alphonse and he would have brought Mello along, but he was getting a little sick and tired of people assuming he was just going to drop dead if he even caught a glimpse of this . . . shadow-Sora.
Since there were more people on the lower floors and, like Mephiles had pointed out, Sora's MO was taking hearts, Edward had started on the ground floor and was working his way up. So far he hadn't seen anything unusual except for chibigami Duo looking over the blood stains on the floor outside of his room, presumably from Zidane, another victim of Sora's. They'd nodded to each other and Edward had moved on up through the third and fourth floors with no sign of anything.
Finally he was back on his own floor and he was almost sure that he would make it through there without a sign from anything. But then he saw movement ahead of him. Someone had turned the corner, but he could tell that it wasn't Sora since there was nothing about the person that gave off any sense of danger. In fact, Edward was almost drawn to them, curious about who it was; there was just something telling him that he needed to find out who it was that was walking down the hallway towards him and when he finally got close enough to see . . . he stopped. Staring, his heart aching in his chest almost as painfully as when Sora had torn it out and he could feel his legs weaken beneath him, the shock too much of a blow for him to even be able to hold himself upright as a single word escaped his mouth in a quiet whimper . . .