Twists of Fate: Entangled Threads
Cassandra "Sandy" Alice Turner, younger cousin to none other than the Hermione Granger was thrown into the peril of the Wizarding World as a Muggle-born witch. Despite being two years younger, she found herself being thrusted into the dangers the Golden Trio faced, over and over again. For a while, she's certain that they'll make it to the end, together, until Voldemort takes over the Ministry just as she was to start her 5fth year. As a result, she embarked on a Horcrux hunt for several months, until the Battle of Hogwarts. There, mid-duel against a Death Eater, she's unexpectantly send to 1975, by the force of a secret prophecy.
Now, she's forced to roam Hogwarts' halls alongside her friends' parents, as well as soon to be Death Eaters, all while hiding the scar on her arm that exposes her blood-status. With no way back to her time, and the prophecy insisting on a destiny as a hero, she must ensure Voldemort is stopped, and never to return, during the First Wizarding War, while juggling being a teenager with a crush and mental trauma.
Golden Trio Era (briefly) turned Marauders Era (via time-travel)
Sirius Black x fem!OC slowburn
Disclaimer: I do not own the Harry Potter book nor movie series. This is a fanfiction, where I can freely change events from the original storylines, as well as add my own characters, dialogues, etc. I only own my original ideas and characters.