June 1st, 1892 — Diagon Alley
She had stood stiffly in her dress robes at the edge of the dance floor, dancing only twice, with Miss Lestrange and with a fifth year who looked particularly adrift, before retiring to find a game of chess until midnight allowed the seventh years to depart the castle at last. George Waterford had completed her time at Hogwarts, and while Mr. Swann's efforts had not yet determined her fate outside the castle's walls, the new graduate was determined to make an informed decision in all things.
George would not have been entirely unrecognizable to those who knew her but the wig and the dress made for a definite disguise. She had been reading etiquette manuals for some weeks, and it was time to put her studies into practice.
She didn't realize how unfeminine her walk was, drawing some side-eye from passers-by, but given the how busy Diagon Alley was at any given time, few paid her much heed beyond this. It also had not occurred to George that a young lady navigating the streets unchaperoned was, at best, unadvisable—a quick study, but one who did not realize the breadth of what she didn't know.
Like how to fall without cursing like a schoolboy.
There had been something slick upon the cobbles, perhaps some errantly spilled potion or intentionally laid grease of nefarious purpose, but George's feet went out altogether from under her, prompting her to join another who, coming from the opposite direction did much the same.
"Damnit!" she ground out instinctively as she slipped, though nothing was able to leave her immediately upon landing, the wind knocked from her lungs.

She/Her/Hers OOC and in her own narration.