From the comments, this was more depressing than the main body, IMO.
Doctor Gears stayed longer than any of the other personnel (with the exception of the O5 council, of course), assisting others with their re-adjustment into society. He noticed a wide variety of emotions from the leaving staff: some were overjoyed that they were finally done working with such dangerous objects and eager to start a new, normal life; some were angry that they basically had to start over from scratch, claiming that spending the last few years in a facility that according to official record did not exist was shit for their resumes; and, most curious of all, a fair amount of sadness from people who, as far as Gears was concerned, should have been glad everything was back to normal.
Days passed and people left, and eventually it was time for Gears himself to go. As he walked away from the now empty Site 19, he stopped and looked back for a moment, remembering all the time he had spent in that building. He still couldn't believe it was over, that protecting humanity, the job that he had committed himself to for longer than he could remember, was finished. As he gazed back at the facility, a strange thing began to happen: he began to feel rather odd. It was small at first, just a slight discomfort in his gut.
Then, the memories began to fall.
He remembered the constant struggles against 682. He remembered the puzzlement and amusement from testing 914. He was feeling quite uncomfortable now. He remembered the break room with the other researchers, how they would laugh and make jokes and have a great time while he would sit, stoic as always. He remembered the fun they would all have together. He could feel his breathing becoming labored. He remembered, shortly after the discovery of the loss of the anomalies, Bright finally achieving his final wish. He remembered Clef being unable to cope with normalcy and taking his own life. He remembered Rights, normally mischeveous and joyful, cleaning out her office with a distinct look of sorrow on her face. He remembered how even though it was a stressful, terrible place to be, how it was home to more demons and horrors than any other place in the world, perhaps even the universe…it was still home.
For the first time in many, many years, Gears felt a tidal wave of emotions.
And for the first time in many, many years, Gears began to cry.