Streaking

Ever since she was young, Ruby's Semblance has been a great blessing in her life. She could turn herself and anything she could carry that she was in direct contact with completely invisible. Nobody could see her if she wanted to, and any picture taken of her while invisible would not show her. As an additional bonus, her Semblance used an incredibly small amount of Aura, so little in fact that she could regenerate her Aura faster then her Semblance would use up, meaning that she could be invisible for as long as she wants. Though, from her own perspective she was simply see through.

It also allowed her to have some fun like nobody else can.

Contrary to popular belief, Ruby was not a pure soul. She had a certain... hobby. She liked to be naked in public. Using her Semblance, Ruby often sneaked out of the house without wearing a stitch of clothing. Doing so, she often walked through the woods or even through town when she was feeling extra brave that day. She also tended not to wear any underwear, at all. It caused a bit of a scare during initiation, with Ruby simultaneously flashing the forest while a strong wind was going up her combat skirt.

Lately, Ruby also started using "toys" during her adventures. Usually a small vibrator deep in her pussy, right up to her hymen, and a second one taped to her clit, with both being controlled by her scroll.

So, here she was. In team RWBY's dorm, as naked as the day she was born with a pair of rotors moments away from giving her pleasure, and about to indulge with her hobby once more.