[From
here]
Considering most would likely use one of the two stairwells located in the Western wing of the institute, it was natural to find the one Xemnas had selected to be void of such existences. The small radiance provided by his own flashlight was all that sought to break the darkness, yet the beam did not reach far for him to be able to perceive all that was shrouded in these unmoving shadows. The Superior still retained his caution as he began ascending the stairs. The staircase was, after all, a less than desirable place to deal with the institute's monsters.
[To
here]