Unfortunately for Oleandra, her baffling predicament did not magically sort itself out after a good night's rest; not the way sleeping used to send her back to her rightful time, in those early days of time‑skipping. In fact, she did not sleep a wink that night… though not for lack of trying, but simply because this body was incapable of it.
"I guess I know exactly how Daphne feels, now…" Oleandra muttered, staring at the ugly floral patterns stitched into the tent's ceiling as dawn's light filtered red through the tinted fabric. "This is no way to live…"
The reflection doppelganger was merely a facsimile of Oleandra's true body, an imitation of life meant to allow its creator to be in two places at once for a short period of time. While it could eat and drink, it could not taste anything, nor could it subsist on the nutrients found in food. It was a body sustained by magic, and Oleandra was fairly certain it would shatter into a million glass shards if struck too hard.
"Finally," Oleandra sighed, hearing rustling noises from the neighbouring room through the thin fabric partition. "They're waking up."
Her initial panic, upon finding herself powerless in the midst of four people who wanted her dead, had waned hours ago. There was only so much worrying she could do before the boredom of hours spent staring at the ceiling set in.
After all, if Oleandra was in the reflection's body, then the reflection had to be in hers. She had no idea how it had happened, but she had no doubt the reflection was tirelessly searching for a way to swap them back, and since there was not much she could do without magic, she might as well relax and learn as much as she could from Harry and his friends while she had the chance.
"Morning," Hermione said, yawning as she stepped out of her room. "What's the plan for today… oh, it's you."
Harry, Ron and Sirius were still snoring in their room, sleeping the morning away.
"Good morning!" Oleandra said brightly, handing Hermione a steaming mug. "I found some chocolate in the cupboard, and I thought you all might like a cup of cocoa before starting the day."
"I think coffee might be in order for the boys," Hermione snorted, nonetheless accepting the proffered mug and taking a sip. "Mm, that's hot. Thanks."
Oleandra watched as Hermione contentedly wrapped her cold fingers around the warm mug, blowing on the liquid and occasionally taking a sip. For Hermione to accept a drink she had not seen brewed with her own eyes, it seemed her reflection had earned her trust.
"So, the Muggle-Born Sanctuary," Oleandra said, referring to the previous evening's topic of conversation. "You're that eager to be rid of me?"
Harry and his friends were too kind-hearted to drop 'Viviane' in the middle of the wilderness, not when she was just one of Oleandra's many 'victims.' After all, the British Isles had fallen under the Wizarding World's dominion, and they could not bear to imagine what would happen to the girl if they left her on her own…
"Sirius and I are all for letting you stay, but Harry and Ron want you gone," Hermione sighed. "Your face brings back far too many bad memories."
They had already extracted all the intelligence 'Viviane' had been allowed to reveal, so the only use left for her was her limited value as a dictionary to help Hermione translate her ye olde copy of The Tales of Beedle the Bard.
As for Sirius, he had a fondness for Muggle girls, felt he owed Oleandra a tremendous debt, and had nothing but good memories of her. That being the case, his interest in her was perfectly natural.
However, at the end of the day, Harry remained the leader of their little expedition, so his decision was final: 'Viviane' couldn't stay with them.
"Well, we're getting awfully close to the sanctuary's entrance," Oleandra said casually. "We're in Dartmoor, yeah?"
Hermione lowered her mug and stared at Oleandra suspiciously.
"First, how could you possibly know that?" she asked, "and second, how could you possibly know where we are?"
They had Apparated into a clearing in the middle of some fairly average-looking woods, and, as far as she knew, 'Viviane' had not left the tent from the moment Sirius and Ron finished erecting it. In fact, not even the menfolk knew where Hermione had taken them; they only knew it was somewhere reasonably safe.
"I glanced out of the window before going to sleep," replied Oleandra, pointing skywards. "The stars told me precisely where we were."
Oleandra didn't need a sextant to calculate her position; she could do it all in her head by closing her eyes, and that was not something she required magic for. But before she could begin to explain how she knew where the entrance to Mai's Muggle-Born was located, a cry of anger rang out from the boys' room.
"Damn, I've lost her!"
A few moments later, Harry, Ron, and Sirius stepped out of their room and sat at the coffee table. Without taking his eyes off it for a single second, Harry unfolded a yellowed piece of parchment and smoothed it out on the table.
Oleandra frowned. That was clearly the Marauder's Map, but what she could not understand was why Harry had taken it out. After all, it was not as if he could ever return to Hogwarts, and what use was there in knowing where the students and teachers were if he couldn't do anything about them?
"Come on," Harry hissed, scanning the map intensely. "Where are you…"
"Maybe she found another blind spot?" Ron ventured. "Like that place you told us about last night, mate… it's not on the map, like the Chamber of Secrets."
Oleandra waltzed over and peeked over Harry's shoulder. Her pocket watch was reversed, like her reflection, but it could still tell the time; and, according to it, this was around the hour in the morning when she would wash up in the toilet before heading to the Great Hall with the other Slytherins for breakfast…
…and that's when she caught sight of a familiar name in the common room.
Viviane.
"I just know she's up to something," growled Harry. "And I'll know exactly what that is once I find her…"
Oleandra knew for a fact that there was no one named Viviane in Slytherin— not in the first, second, third, fourth, fifth, sixth, or seventh years— but, as an oblivious Gryffindor, Harry was obviously unaware of that.
However, if Harry had indeed been obsessively following her movements all this time, he doubtless knew which room she slept in. And as thick as he could prove himself to be, even he would notice that something strange was going on if Viviane— the very name the reflection doppelganger had given him when she introduced herself— went to sleep in Oleandra's bed, right next to Daphne's…
Oleandra's heart sank.
Before Harry realised that something fishy was going on, before Viviane returned to her dormitory room for the night… she somehow had to get as far away from the four Gryffindors as she could.