Yes, she's committed to living a little

With a shaky breath, Ruby put her scroll into her belt pouch and buckled up. Opening the dorm door, she poked her head and scanned the hall. Early signs indicated it was vacant, and she didn't want to wait around for that to change. Her ears perked to their fullest, she stealthily crept into the hall, making sure she shut the door quietly. Even though she had justified her decision to herself, she still felt a bit naughty, and even more paranoid because of it. Verifying she was alone, she used her semblance to speed off to the party, utilizing it in short bursts and always stopping in hidden areas, all the while admiring the other costumes. She spotted a group of people walking by in colorful space suits, a couple male students wearing lab coats (though one coat was pretty shredded and splattered in paint), a couple obvious anime characters, and smattering of others that she couldn't quite place what they were. It didn't help she was only catching glimpses; given her lollygagging getting ready, she was close to running late.

After what felt like forever, she was finally at the party hall, and slipping in the doors, she was happy to see it was quite dim inside, meaning she had less chance of being seen entirely in her costume.