Black Sheep (Harry potter universe)

Cressida Travers has spent her first four years at Hogwarts carefully constructing a life that works for her.
She plays Quidditch, ignores pure-blood politics, keeps Draco's dramatics at a tolerable distance and causes just enough trouble to remain entertained without becoming the center of attention.
Then Harry Potter arrives.
Within months, there is a troll in the castle, a forbidden corridor guarded by a three-headed dog, suspicious professors, illegal dragons, enchanted broom incidents and first-years sneaking around after curfew as though Hogwarts is their personal adventure novel.
Cress does not want to save the world.
She wants the Seeker position, a decent practice schedule and perhaps Oliver Wood to stop looking unfairly attractive while criticizing her flying.
Her story is not about discovering that she is secretly more important than Harry. It is about an already-established Hogwarts student trying to pursue her own dreams while canon chaos repeatedly disrupts her life.