Inspired by a lovely trans positive headcanon from tumblr!
Sammy
10 pm, Gryffindor common room
Rose Granger-Weasley's fifth year
It's late. Nobody's looking. My hair is long enough that nobody would notice. Sammy shook her head, curls bouncing, and muttered "Not doing it. No way."
"Sammy? You okay, mate?" Micheal was looking at her and frowning.
"Yeah, just tired." Mike got up, stretched, and headed towards the stairs.
"Alright. I'm going to bed. You coming?"
"In a minute. I want to sit for a while longer."
"Whatever, man. See you at breakfast." With that, he disappeared into the dorms. Sammy looked around again, hesitating. Now there's really nobody looking. I have to at least try. She got up and headed for the stairs, taking a breath and putting her foot on the first step. Nothing happed. No groaning noise. No slide. The next step. Still nothing. It was the same all the way up the stairs.
Standing at the top of those stairs was the best feeling in the world. So good, in fact, that Sammy began to cry. She must have been louder than she thought, because the fifth year door opened and Rose stepped out, looking worried.
"Is something- Sammy? What are you doing up here? Don't you know that only..."
"I knew it." Sammy interrupted. "I knew I was just as much a girl as you were."
Rose's expression brightened. "Oh, so that's who the new bed is for! I think your things are already in there." She hesitated a bit. "Do you want to come in?"