It was nostalgia that caused the old guard to let Olivier inside the training facility.
Well, that and the run-filled treat Olivier had given the guard. He was quickly able to enter the building and make his way toward the guest section.
Since Olivier was young enough to pass as a trainee, no one stopped him to check. There were too many people to keep track of in this place that no one even realized who Olivier was.
It was not until Olivier was standing right in front of the private section did, he realize that he could not enter the main trainee area.
The access required a pass and Olivier was currently missing the pass.
"Hey kid, what are you doing in here? Are you lost? Can we help you out?"
Some passerby trainees noticed Olivier's plight and decided to stop near him. For them, it was not such a weird thing to see a trainee panicking because they lost or forgot their pass.
They all had done that once or twice before anyway.