Harry was stuck behind the statue in the alcove until the massed Slytherins had moved on. Some skulking off to their common room, others hunting for the Weasley twins and some revenge.
It was frustrating to be stuck there, and mortifying to have to squeeze out once it was clear. She quickly discovered how sensitive her nips were to the least friction, a blush coming to her cheeks, and her pulse quickening. She wanted to race away, but every attempt at going faster than a steady walk, set the girls jiggling in a disturbing fashion.
The perspective was very different from his usual one, so it was hard to judge her own size. But, the girls, felt too heavy, and too mobile at the same time. His uniform wasn't tailored to control 'the girls'. As he walked, the size of her rump was clearer. She felt the difference in her gait, the extra shimmy and roll of her rump as she walked.
Keeping the cloak in place, she headed to the Great Hall. Knowing the twins would be holding court, boasting about their latest prank. Waiting on the targets revealing themselves... embarrassing themselves.
- - - - -
Harry was sure it was just a prank, but the oddity of her new body commanded more assurance than that. Snorting to herself, she spotted a couple of transformed Slytherins, as the lurked around near the Fat Lady... Sure they were in the vicinity of the Gryffindor Common Room, if not of it's precise location. She didn't recognise them (naturally) but their new sex was clear from their blushes, and ill-fitting uniforms.
Dismissing them, Harry headed to her target. Keeping her eye out, she hoped to encounter, Ron, Ginny, or Hermione, and not have to risk the bustling hall. The cloak was an open secret, so a quickly whispered, or hissed word should be enough to attract any of their attentions.