RWBY Shrunk/Transformed

Ruby watched as Cinder Falls sauntered towards Pyrrha and placed her hand on her forehead. She watched as Cinder's touch made her body turn to glowing dust in the wind. The top of the fallen tower of Beacon shined white as the girl with silver eyes screamed.

The Grimm dragon was turned to stone, Ruby and her sister Yang returned home, Cinder and her gang were no where to be found, bound in the walls of Salem's castle. Ruby, knowing what happened at Beacon would shortly undergo at Haven, set forth with the remains of team JNPR, their lost friend never forgotten.

But Pyrrha was not dead, as many had imagined. No, she was saved from Cinder's Maiden power by Ruby's silver-eyed 'event.' The glowing dust that seemingly drifted into the wind was put back together into a living, breathing Pyrrha.
Unfortunately, this revival process left her just a little shorter. Okay, a lot shorter. Very short, actually. Tiny enough not to be detected as she was carried back from Beacon. She could have revealed herself at any time to her travel mates, but she was scared. Be it whether of what they might think or feel of her, or what they might do to her.
So there she was, surviving on pure will, at the unknowing feet of someone who once knew her.

But who was it that she ended up being with?