No one in the team dared to move. Even Ayane was frozen in place. She hadn't expected any kind of evidence at all, and the complete files on the team was... Well... Overwhelming. Even the people who ran the exam wouldn't have full access to that information, alliance or no alliance. It was a huge deal, because all villages had secrets that needed to stay secret, and gathering the teams in some kind of folder and passing it around could be devastating. 

She let go of her weapons and formed new chakra threads aimed at the folder in the stranger's hand. She grasped them carefully and then with a sudden tug she jerked the papers out of his hand. They flew through the air almost impossibly straight toward her. She simply reached out and picked the bundle out of the air as it passed. 
The folder opened in her hand and she quickly scanned the papers. It was all there. Name, rank, village, speciality... Luckily the stranger hadn't gotten hold of any kind of info about their techniques or anything like that. That would've been very bad.
She put the papers on the ground and spread them out a little so she could see them all at once. Her eyes darted from the ground to her team as her eyes found the paper that confirmed their identity. 
They were all in there, even the stranger. But that didn't make any sense. That would leave them with a six-man team and the instructions had been very clear about the number of people in a team. 
She scanned the papers again and realised her mistake. There was no paper with "Ikazuchi Zee" from Kumo on it. Instead she read  "Hīringu Raito" from Konoha. 

She stared at the documents in disbelief. It was too crazy to believe, the whole thing was far too suspicious. But there it was in black and white, with official seals and everything. Either this was the real thing or the guy in the mask was a master forger who had somehow had time to make an exact replica of the official seal in just an hour or so to fool them. The seal had been on display at the briefing earlier this morning before the exam started.
"He's telling the truth" She said, still not entirely convinced, but the evidence couldn't be false. "Zee isn't supposed to be here, he is." She pointed at him. "He's a med-nin from Konoha called Raito."