Lower hallways

Harmony left the room and darted downwards. she ran to the right (which on the map shown, left) to the end of the corridor and ran upwards. She darted towards the door on the right and shut the door behind her.

With such a sprint subtlety was far gone. Overreaching Harmony is noticed by the patrol heading away from her initially. She turns around and smirks, hands already glowing purple. The girl smells a free pass for the semester.

[Current situation]

Spoiler:

Hamony slowly walked towards the witch, slowly sung a song to use the dust around and it turned into an orb into her right hand. She stopped in reasonable distance.
"Sonic beat!" she cried and let loose sonic waves of dust bunnies.

The witch already ramping up to cast responded by finishing her own spell, spawning an animated teddy bear with large chompers that devoured the bunnies, after which the teddy slumped and disappeared again.

[Note]
Harmony is unable to detect the other patrol at this very moment.

Ok, i have one shot to do this she thought to herself.
"Muse’s words!" she cried, hoping it will work.

The witch looked shocked to see her spell go like that, clearly something happened that wasn't suppose to happen here, and because of it she was completely flat footed to the next spell incoming, trapped and getting pummeled by a sonic vortex her cries of help fade to nothing but lips moving.

Yes!!!! Harmony thought, and dashed to her destination, closing the door behind her.

As soon as Harmony made it through the door, the sonic vortex faded. The witch coughed as well as gasped a cople of times as the spell definitely stung.

[Note]
Harmony cannot detect movement outside currently. The witch is not coming for the door immediately.

At least it's something Harmony thought and she crept away from the door.

The last thing harmony can detect are footsteps going away from the door. Harmony can no longer detect the positions of the patrols.

[Note]
My apologies for the lengthy response time.

"Now, where am I now?" Harmony wondered, hoping to find a seat to rest.

Only now harmony looked around did sh realize this room was unlike any of the previous rooms she had visited up until now. The large cavernous room is dimly lit. Higher than any of the others it every step reverberates. At the walls she could see remnants of what she guessed once could have been bleachers. The wooden floor is made of gnarled planks and clouds of dust erupts from the seems with each step, along with creaking as if the floor was on the verge of breaking. Every step reverberates making the place sound hollow. Through the room some crates are placed, nine in total. Here and there Harmony might recognize some decrepit gym materials, covered in a thick layer of dust or serving as suspension for cobwebs.

[note]
The map isn't an actual accurate portrayal of the crate placement. It's more scattered through the entire room.

[Current situation]

Spoiler:

"Well, it's better than that teacher's lounge, though they had seats" Harmony grumbled, then looked at the crate close to her. She went and searched it, hoping for a key.

The crate closest to her was home to a family of moths, who erupted from the crate flying into harmony's face after which they scatter. Once the moths passed Harmony would find very old badly tattered cheerleader uniforms in green and black with purple letters "CT" branded on them.

"If only I was able to turn myself to a wondering ghost, this would help me out" Harmony said, but took note of the outfit. She went to the next crate, and searched.

The crate Harmony approached seemed to be locked with a padlock and a lot sturdier than all the others, though otherwisely it looked indistinguishable from every other crate.

Harmony thought, and decided to use the key that she found earlier to see if that was the move.

When bringing the key near the padlock it was visibly clear this key that harmony had was a lot older than the padlock nor was it the right size for it.

"Crap! Welp, onto the next one" Harmony said and moved to the next crate.

Harmony moved on to the next closest crate she could see, and were her eyes deceiving her or did that crate just move?

"Why me?" Harmony groaned and darted after the crate.

Getting closer to the crate harmony can hear the distinct sounds of something rummaging in the crate, suddenly it got silent as Harmony stepped on a particularly noisy plank.

Harmony finally got close to the crate and looks for a lock, just in case that she had to come back later. She also unaware of the plank she step on earlier.

This crate didn't have a lock and was about equally run down as all the other crates with the exception of the locked one.

Meow

Harmony gulped and slowly opened the crate, not knowing where that meow came from.