As for maintaining the buildings power, you’re required to crawl through Ballora’s room to the control module. You have to be dead silent.. If she catches you. You’re dead

As you crawl, you can hear her singing and see her vaguely dancing it’s so dark that you can barely make out the horrific details.. She sings “Why do you hide inside these walls, when there mucic in my halls? All I see is an empty room. No more Joy than an empty tomb.”

You continue to crawl through, and your heart stops when these words are spoken “Is someone there? I Can hear someone creeping through my room..?”