What we do know is that her breeding suggests she should be quick. Her father, Mohaather, was one of the sharpest milers of his generation, and her mother's side carries the influence of Pastoral Pursuits, a horse who made his name as a top-level sprinter. Put those two together and you would expect Rose Blossom to have speed in her blood — though breeding is a hint, not a guarantee.
She is trained by James Horton at Newmarket, which is about as serious an address as you can have in British racing. The town is the historic home of the sport, and Horton's yard has hit the ground running this season with 19 winners already. That is a yard in form, and the fact that they have chosen to run Rose Blossom now suggests they feel she is ready. Trainers do not debut young horses until they are happy with what they have seen on the gallops — so there is quiet confidence built into just entering her.
Beyond that, the page is blank. Watch and see.