Timeline: This is set in season 3, I'm going to say before Band Candy because it's difficult to justify why Ethan Rayne would come so soon back after that episode.
Disclaimer: Joss owns the universe, I merely have part of it out on loan.
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Faith strolled leisurely towards Sunnydale High, one hand jammed in her pants pocket, the other easily twirling a stake. She was being followed. Rustling footsteps, soft breathing and the scent of cheap cologne had been present from the moment she stepped out of her motel room. There was the loud cracking of twigs and the brunette slayer let out an annoyed growl. "Alright stealth boy parties over," she said as in one smooth movement she turned, dragging her stalker out his hiding place in the bushes. "Why are you following me?" Faith demanded as she tightened her grip on the man's jacket.
"I wasn't I-I…" the man trailed off, letting out a strangled sound as his feet slowly left the ground. "Okay, okay! I was," he conceded, staring fearfully down at the slayer who was effortlessly holding him several feet above the ground. "I know Rupert," he blurted desperately.
"You know G-man?"
"We were friends back in England before he became a watcher." He squirmed a bit, looking visibly relieved as Faith slowly lowered him back to the ground. "Ethan Rayne," he said as he extended a hand.
"Faith," the slayer replied, as she slipped both hands back into her pockets, ignoring his extended one. "But I'm guessin you already know that."
"I do," Ethan smiled. "Look can you give something to Rip- … Rupert for me?" he asked as he reached into his jacket, a gloved hand pulling out a small toy car, dented and scuffed with age. "Tell him Ethan send his regards," he smiled as he tossed the toy over to Faith.
"Don't see why you can't give it to him yourself," Faith said as she stared at the toy car in her hand, eyebrows raised in confusion. Looking up again she frowned. Ethan was gone. "What the Fu—" the slayer crumpled to the ground as she took a step, caught in the tangle of her suddenly too large clothes.
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This could not be happening. Faith paced around outside the high school library, every so often pushing up the sleeves of her jacket which kept on flopping down over her hands. Her once tight fitting leather pants were now hanging loosely, the bottoms clumsily rolled up above her socked feet. Her boots, now extremely heavy and too large to stay on were abandoned in the middle of the hallway. Stopping her pacing for a moment Faith risked another glance at the polished glass of Sunnydale High's trophy cabinet. Her reflection stared back, dark brown eyes wide and worried as they roamed across her features. She looked young. Faith wasn't sure how young exactly but she was guessing somewhere between five and seven. This was not good. Turning around again she took a deep breath, hesitating for a moment before striding purposely across the hall and pushing open the library doors.
As soon as she stepped into the room she regretted it. The whole gang was there, lounging around the study tables watching Buffy and Giles go through a training routine. The attention turned to her as the door whooshed shut with a soft thud.
"Hello," Giles broke the stunned silence as he pulled off some of his protective gear. "Are you lost?"
"G-man it's me." Faith said, wincing a bit at the sound of her voice. It was strangely high, lacking the deep gravelly quality that came from years of smoking.
"Who?" Giles asked as he squinted at the tiny girl.
"Your daughter," Faith deadpanned, smirking as the color drained from the librarians face.
"M-my what?" Giles choked out.
"Relax G, it's me, Faith."
"Faith?" Willow spoke up, her eyes going wide. "Like Faith the vampire slayer? That Faith?"
"Explains the outfit," Cordelia muttered.
"Oh my god, you're… adorable!"
Faith rolled her eyes, taking a step backwards as Buffy started towards her, arms outstretched. "B don't even try it," she warned.
"What happened?"
Turning her attention back to Giles, Faith narrowed her eyes. "Ran into one of your friends on the way here, does the name Ethan Rayne ring a bell?"
"Oh dear," Giles said as he removed his glasses, beginning to polish them vigorously.
"Gonna take that as a yes," Faith scowled as she crossed the room, hoisting herself onto the table and digging through her pants pockets, finally pulling out a pack of cigarettes which was immediately snatched out of her hands. "Red ya gotta be kidding me." She growled as she made an unsuccessful grab for them.
"So Ethan turned you into a little kid," Xander stated, a mock admonishing look crossing his face. "Didn't your mother ever tell you not to talk to strangers?"
"Xander if you don't shut up I will snap your—"
"Faith!" Willow exclaimed.
"Neck," she finished with a glare, which just deepened as she was met with a chorus of 'aww's.' "Giles, fix this."
"Why would you want to fix this?" Buffy spoke up. "Well right now anyway," she amended as Faith shot her a look. "I'd love to be little again."
"Oh yeah B?"
"Yeah, I mean no responsibility, no school, no—"
"Catch!" The brunette called out as she whipped the toy car out of her pocket, tossing it in Buffy's direction.
Slayer reflexes shifting into gear the blonde slayers hand snapped out and caught the small toy, her bright green eyes going wide as after a few seconds she began to shrink, her hands and feet disappearing under her loose workout clothing. "Faith!"
To be continued?