The Tiny Red Rose RWBY Shrunken Interactive chapter 2 by Moon

Ruby squeaked as she 'accidentally' used some of Weiss' secret stash of dust to make some cool dust bullets. But unlike the first time when the dust chemicals got mixed together to cause her to sneeze and make an explosion. Ruby found herself reducing in size. Inch by inch, her silver eyes widened as she scurried around. "No! What's happen to me?!" 

Suddenly without warning Ruby's scythe, Cresent Rose fell over causing a sudden thud on the floor, but to Ruby's now smaller size it was a booming sound. The Huntress now the size of a thumb tack, stood near the blade of Crescent Rose, her reflection shining back at her. "Ahhh!" She screamed as she fell backwards on her butt. "I'm tiny!" 

Getting up to her feet, Ruby used her Semblance to dash around the room. To her she seemed like she was going fast, but to anyone who might've seen her. Would just see a small red blur go by. Before Ruby could even reach for a higher place, the door opened. Ruby gasped as she came to a halt, wondering who could've came.