The principal's office is in the center of the lowest level.

[ It's an inward-growing spiral, but Heine doesn't clarify that as they enter a deep staircase. The footsteps are coming from above them now. ]

Even if they're not armed, I don't want to deal with any hostile projections. [ He continues down the stairs, taking them two at a time and keeping an eye out for an exit landing. ] ...too bad there's no elevator.