Actually, Cherry didn't intend to wander around.
She was just bored and wanted to find Gavin Graves on the floor where he was having a meeting, but she wasn't familiar with the layout and couldn't find the place.
She tried to take the elevator back the way she came, only to discover she couldn't because the president's exclusive elevator requires a key to operate.
Assuming that if she couldn't take the original elevator, she could take another one as long as it reached the top floor, she thought it would be fine.
At that time, she had no idea that other elevators couldn't reach the president's office floor, and even the emergency exits were sealed to ensure the utmost privacy and safety for the group's top executives.
After one trip up and down in the elevator, Cherry found she couldn't reach the desired floor, so she returned to the first floor dazedly and chose another elevator.
