the_debt_of_time

Kingsley took the bait. "When you and I helped retrieve Harry from his aunt and
uncle's house last year, how did we fly away?"
Mia grinned, happy that someone was taking this seriously. "We rode a thestral."
When he looked pleased with her answer, she decided to stick with him. "Now, Minister
Shacklebolt, at any point during that night or any night that preceded or followed it, did I
save your life?"
Kingsley frowned, his brows pulled together in curiosity. "No."
"To clarify: you do not owe me, Hermione Granger, a life debt?"
"I know my life debts, Hermione," he said very seriously. "I keep a running list in
my head. Used to be helpful when I was an Auror. Is there a reason you ask?"
"Could you recite that list from memory, Minister? I assure you, I have a point."
"Well, umm, Alastor Moody," he began, and everyone took a brief moment of
silence to acknowledge their fallen comrade. "Robards once saved me from a cursed object.
Tonks here saved me from a Death Eater. Frank Longbottom took a hex in the back for
me once that landed him in St Mungo's for a week." The mention of the hospital seemed
to trigger a memory because his eyes lit up. "Oh! And then there was―" He paused before
speaking again, his eyes falling over Mia in sudden recognition and shock. His normally
loud, deep timbre lowered to a soft whisper. "That's... That's not―"
Mia smiled apprehensively. "Hello, Kings."
He slowly drew his wand, shock fading into swift suspicion. "Who are you?"
As smoothly as his surprised expression shifted to wariness, Mia's smile turned into
a teasing smirk. "Am I not Hermione Granger? I thought we'd just covered that."
"Anyone could have learnt enough about Hermione Granger, but what you're
saying is―" His eyes flickering to Remus and Sirius, who were slowly gravitating toward
Mia, hands hovering over where they had their wands holstered. "It's not possible."
"Remus, Sirius, please do back up. I'd greatly prefer it if Harry, Ron, and Tonks
didn't have to arrest you for attacking the Minister for Magic," Mia said with a smile before
turning her attention back to Kingsley. "I can prove it."
"How?"
"Who here owes a life debt to Hermione Granger?"