the_debt_of_time

He turned to look in their direction, but would not be able to spot them in their
current invisible state. He stared for a long while, though, until Madam Pomfrey nudged
him gently with a hand on his shoulder.
"No time to waste, Mr Lupin."
He nodded, pressing forward beneath the tree.
Mia let out a sigh of relief when she saw Remus disappear from view and Madam
Pomfrey make her way back across the grass.
"Something still doesn't feel right," James said.
Mia nodded in agreement, her stare held on the Whomping Willow long after
Madam Pomfrey returned to the castle.
"Do you smell that, Mia?" Sirius asked, his voice anxious. "Something new."
"I don't think it's new." She worried her bottom lip between her teeth as a shiver
crept up her spine. As if to confirm her suspicions, the passage to the Whomping Willow
reopened, and all of the teenagers suddenly held their breath.
A large, familiar figure emerged from the passage dragging something at his side.
As the remaining light of the setting sun angled over the person, Mia's eyes widened as she
saw a vicious-looking man with matted grey hair. Even from this distance she could see
the glint of sharp, pointed teeth.
Fenrir Greyback.
"Sufficient for you?" a sharp voice muttered from around the corner, and Mia
almost let out an audible gasp at the sight of their Defence Against the Dark Arts professor.
"Reckon you've done well enough," Greyback rasped.
Mia shook with rage at the sight of him. This was the creature responsible for
causing so much pain to Remus. This was the werewolf responsible for attacking Bill
Weasley. This was the beast who had captured her, Harry, Ron, and Sirius and brought
them to Malfoy Manor. She swallowed down the rising bile in her throat and pushed back
the thought in her head that screamed Attack! Kill! Death Eater! forcing herself to remember
that, in the end, the werewolf was to die at the hand of Draco Malfoy.
Unfortunately, that not-at-all-tragic death would not occur for another twenty-two
years, and Future Remus had never relayed a story about running into Greyback whilst he
attended Hogwarts. Mia had no idea what was going to happen.
"I've been at this school all year, just for one errand?" Professor Higgs snapped.