the_debt_of_time

Minerva assured them that they had another year to think about whether or not to send
the girl to the magical boarding school in Scotland, and the Grangers—save for
Hermione—seemed to be pleased they had time to process the news of having a Muggle-
born witch.
After a polite conversation over tea, Minerva rose from the sofa, said farewell to
Hermione—who immediately rushed off to her room to read her new book—and then
turned to say goodbye to the Grangers.
"I have one last question I hope you might be able to answer," she said as she
stepped through the front door. "Does the name 'Mia Potter' mean anything to you?"
"No," Helen said, shaking her head. "Should it?"
"I don't think so. A former pupil of mine," Minerva said with a tight smile. "Your
daughter reminds me very much of her. She was bright and eager to learn, though your
Hermione appears to be a great deal more polite," she said pointedly, recalling far too many
detentions with the young witch and her Marauder entourage. "The former pupil of mine,
Mia, has a nephew who will be attending Hogwarts next year as well. I imagine he could
use a good friend like your girl."
Minerva made her way back to Hogwarts via Apparition to the Leaky Cauldron and
then a quick Floo trip into Albus Dumbledore's office. She stood in front of the large desk,
arms folded and the crossest look on her face she could possibly summon.
"Good afternoon, Minerva." Albus smiled, blue eyes twinkling. "Lemon drop?"
"No, I do not want a bloody lemon drop!" The older witch hissed. "Would you care
to inform me as to why I stumbled upon a rather interesting coincidence this afternoon?"
"That depends upon the coincidence."
"The coincidence I speak of is the fact that a young Muggle-born witch I met today
bears a striking, near mirror image resemblance to that of a former student of mine. I
imagine the name Mia Potter rings a bell?"
If he tried to hide the brief flash of guilt, he didn't do it very well, and Minerva
caught it immediately. "Albus! Explain yourself right this minute, or I swear to Circe, I will
transfigure you into a newspaper and set you beneath Fawkes's perch!" She huffed. "Is it
really her? How?"
Albus nodded and then simply said, "Time-Turner."
Minerva gasped. "So is she Hermione Granger or Mia Potter?"