Rory wasn't angry at him. Maybe she was when they were younger, maybe she was angry a lot, but she wasn't now. There was no reason, no way. Dennis had basically risen from the dead. Rory had written him off, she stopped believing he might be out there somewhere, alive and kicking. She had given up hope, and now he was here, and she couldn't shake the feeling that she was seeing a ghost.
But that was in his eyes. He was haunted. Rory just had to look at him and it was right there. She didn't want to ask why, but she already knew. She already had a feeling. Her brother wasn't the reason she was reacting the way she was. It was just the only way she knew how to react. Rory didn't want to cry, and that was her only other option.
"You..." walked. He walked. Rory shook her head, launching herself a few steps forward before turning, walking back. Pacing for a moment because there was too much building up, too much emotion, and she needed him to not be hurting in the way she knew he was.
"Did Walter-- Dad find you? He left to look for you and...and your family." It had to be said. Had to be brought up. But it ripped right through her as those words were uttered, and she had to force her gaze to focus on her brother. She was asking something horrible, something that had a horrible answer written as ghosts in her brother's eyes. That was what made her angry. Not him, but what the world had done to him.