It was the usual routine for the Autobots and their human charges, they get picked up by their guardians and taken to base. Right on cue, two familiar vehicles drove in as Ratchet was busy reading in the corner. The two younger kids got out of the cars, ready for their typical ' stay in the base ' activities.

" That thunderstorm was crazy last night," Raf said as he approached Miko, the town rarely received any wet weather. " I know right, couldn't sleep through all that lighting and thunder " Miko yawned, a bit of tired tears appearing in the corner of her eyes.

She looked around for a specific witch but to no avail, she wasn't there. " Hey, where's Jack and Arabella " Raf perked his head up, noticing how the two older teens weren't there." Jack and Arcee were sent to investigate an energon signal and Arabella mentioned that she releasing a ... " Bulkhead tried to remember what creature that Arabella said.

Ratchet finally looked up from the book to the gathered group, " Jackalope I believe that's what Arabella mentioned " he remembered the chapter from the fantastic beast book that she gave him, of course enchanted that it was large enough that the medic could read.

" Aww without us, I wanna see " Miko dramatically said, she loved all the creatures in the tiny, magical suitcase, her favorite are the Nifflers which Ratchet still remembered the little bugger causing chaos in the base.

Back in the forest, Arcee and Jack were currently walking in the forest, tracking the signal. The forest was quite gloomy and because of last night's weather, the place became moist which unfortunately attracted mosquitoes, much to Jack's annoyance.

" Ah! Really wish I'd packed some insect repellent. " He swatted the bugs away as he trenched through the forest floor, smelling the wet earthy smells.

" The mosquitoes out here on this routine recon are the size of vampire bats." he tried swatting the little mosquito but missed every time. " And they drink just about as much blood. "

Arcee looked down at him with slight humor, " Quite the outdoorsman, aren't you, Jack? "

" You wouldn't be making fun of my survival kit. " he smirked and Arcee smirked back. " Maybe "

" I may not have stinger-proof metal skin, Arcee, but in a pinch, I can use my multi-function pocketknife and magnesium fire starter to cook up some freeze-dried Mac and cheese. " he patted his survival kit poach.

" You have your tools. I have mine." The tracker begins beeping as Arcee checks the screen, " That's odd. Ratchet's satellite scans were accurate. " but she frowns a little, " But subterranean
Energon deposits don't cause this kind of surge. " the two continue to head toward their location.

Somewhere in the same forest, Arabella's suitcase is in the middle of the forest where there is a small grassy field. " Come on little fella, it's alright "

The curly, brunette witch climbs up, holding what seems to be a rabbit that has antlers attached to its head. The little creature's nose was twitching as its ears moved, hearing any noise or threats.

" Your leg seems to be healed up now and according to my research, this forest should be a typical habitat for you little guy " The Jackalope looked up at the witch, almost terrified to leave her arms Arabella sadly smiled, she tried not to form an attachment to magical creatures that are rescued and released but she loved them all.

The two notice a small group of Jackalope appearing out of their burrows, sensing one of their kind here. Arabella softly smiled as she placed down the magical rabbit creature on the ground.

" Off you go, it's fine " It hesitantly looked up at the witch before heading to the group, she watched the other's accept the newcomer, nuzzling each other.

Arabella began walking back when she noticed scorched marks on the trees and that most of them were spit into two or destroyed, towards a certain direction.

" What the? " Arabella picked up one of the broken branches and looked in the direction of the broken trees, she knew something big had happened, and soon she started following the path.

Arcee and Jack were also following the destroyed path which Arcee knelt down and Jack followed as well. They spot the ship though it looks pretty damaged.

" Stay behind me, low and close. " Arcee said, but a snap was heard behind them. Arcee turned around, ready to shoot but saw Arabella jumping in fright by the massive blaster pointed at her face.

" Arabella! What are you doing here? " Jack exclaimed, his heartbeat skyrocketed when his guardian was about to shoot their friend.

" I was releasing a Jackalope here and followed the path to you guys, aren't you guys supposed to be tracking a signal? " Arabella whispered-shouted as she knelt down next to them.

" It looks like a ship, is it Autobot or Decepticons? " Arcee looked down at the brown-haired witch, " Can't tell "

The two-wheeler femme stalked towards the wreckage, " Both of you stay here " which the two teens looked worried.

Arcee carefully approached the entrance of the ship, pointing her blaster but it was empty. Heading inside, not aware of someone or something following her.

Jack and Arabella's eyes widen when they notice Arcee entering the ship, " Arcee! " Jack ran, worried for his guardian. Arabella followed, pulling her wand out of her sleeves, sensing something about to happen.

" Arcee, what's wrong " The two approached her and the Autobot tried to put up a brave facade but Arabella could recognize the expression that Arcee wore, fear, and that made the witch instantly worried.

" I know who this ship belongs to. " Arcee says gravely which she comms the base, " Arcee to base. I need a ground bridge asap. "

" W-wait. Why? Whose ship is this? " Jack kept asking but Arabella felt her goosebump rise on the back of her neck, a chilling sensation was taking over her, a sense that something was watching them.

Arcee tried to contact Ratchet or anyone but it just came back scrambled" Scrap.Com link's dead. "

" The ship's got to be transmitting a high-frequency scrambler pulse. " Jack and Arabella looked at each other worried.

" A-arcee? You're kind of freaking us out here. " Jack said which Arabella couldn't shake off the dread she was experiencing.

Soon Arcee glared at the deep forest ahead, " You both wait here " Both of them still followed her, and the witch noticed that Arcee was in some sort of trance, " Arcee are you okay? " Arabella asked, gently placing her hand on her servos.

Arcee snapped out of it and transformed into her vehicle mode, " Climb on. " Arabella hopped on behind Jack as he handed her the spare helmet.

The motorcycle takes off, surprising the urgency and speed, Arabella gripping Jack, not to slip off the bike, especially when jumping off the trench.

They finally stopped, Arabella was shaken from the drive, she rode on a broom or even a dragon but this made her cling to Jack, scared.

" Okay, was that really necessary? " Jack looked equally shaken up as well.

" Arcee to base. Scrap! " the signal to base still wasn't working, this made the two-wheeler more worried for her and especially the two teens with her.

" Look, we've seen danger before. " Jack emphasised himself and Arabella, and they watched Arcee transform back.

" Wait here. I mean it this time. " She warned the two, hopefully, they'll listen.

" Okay, first you shut me out. And now you're ditching me? " Jack almost looked hurt at his guardian " I thought I was your partner. "

" No, Jack, you're a kid. You're only here because this was supposed to be no risk. " Arcee says as she sternally looks at them both " Got it? "

Arabella watched along with Jack his guardian drive away from them. Jack frowns as he approaches the trench and slowly climbs down, and Arabella does the same.

Arcee drives into the heart of the misty forest, flaring her blasters at the danger awaiting her and she spots a tree stump, covered in acid. She clenches her optics as the haunting memories come back to her, the war, her capture, and the femme who tortured her.

Arcee slightly shakes as those memories repeat in her helm. She spots Airachnid about to harm a human in a tent. She tackles to spider-femme down the rocky hills.

Finally crashing against the mountain wall. They both stand up as Airachnid approaches the two-wheeler, " Arcee, small universe "

" Too small, Airachnid " Arcee snarks back.

" You're still holding a grudge? The war's been over for megacycles. " Airachnid says. Arcee glares at her " Tell that to the Decepticons. "

" These days I travel solo in pursuit of my new hobby," she explains, a cruel smirk playing on the spider-femme lip plate. Arcee glares as she remembers seeing the horrifying collection of different corpses, each from a different planet.

" I got a look at your souvenir case."

" You mean my trophies? I collect endangered species. " the evil femme looked proud over her inhuman habits " Of course, they aren't really endangered... Until they meet me."

" And I have a slot reserved for "human." " Arcee instantly thinks of Jack and Arabella, becoming more protective. She strikes at Airachnid, the two tackling and fighting.

Arabella hears the fight close by and Jack instantly runs there. Arcee and Airachnid spots Jack and soon Arabella heading down the hill.

Arcee looks at the two surprised and worried which allowed Airachnid to shoot her webs at the Autobot, tapping her in the webs.

Jack and Arabella ran towards them," I told you to wait for me! " Arcee shouted to them, but they both helped pull the webs out. " Well, partners don't ditch partners. " Jack argues back as Arabella pulls a knife out from her bag and begins cutting.

" Get this through your head -- You're not my partner. You're a liability." she harshly says to him, she was afraid to see him dead, like her other partners.

" I don't believe you. I can see it in your eyes. You're afraid, Arcee,
and you're never afraid. " Arabella winced as she could hear Arcee's thoughts and memories, seeing her fear.

" You're right, Jack. " Arcee optics were full of fear " I am afraid... Of losing you. " Jack looked at Arcee surprised.

" You sure have trouble hanging on to your partners, don't you? " Jack and Arabella stood protectively, the brunette witch flaring her wand out, ready to use. "We both know what happened to Tailgate."

" But I recently picked up some Decepticon radio chatter regarding the passing of Cliffjumper." Arcee looked hurt and shocked which the spider femme continued.

" At some point, you really have to ask yourself, Arcee, "Is it them, or is it me?"

" Do you get it now, Jack? She's not interested in me. She hunts indigenous species,
and she's on earth. " Arabella instantly understood what she meant and looked terrified.

" That means humans. You! RUN!!! " wasting no chance the two humans ran, as Airachnid shot more webs at Arcee.

" And that's why I now prefer to work alone."

" It's so sad when bad things happen to those close to you." she coldly says, " But don't get me wrong -- I fully intend to snuff out your spark."

" And, believe me, I will make it hurt. But that won't compare to the pain you'll feel knowing I'm adding your humans to my collection. " she looks at the two humans running uphill, like a predator ready to hunt their prey.

" Jack we have to keep running " Arabella tugged his shirt as they ran farther away, hopefully away from Airachnid. The brunette witch could hear them shouting out their names but had to keep running.

They could hear Airachnid chasing them down, " That's the spirit, Jack, Arabella. Play hard to get. " soon the two used the darkness to hide from the insane bot. Hiding under the log, they tried to keep their breathing quiet, afraid that their breathing could attract her to them.

They slightly jumped when a metal spider leg stomped right next to them, Arabella placed a hand on Jack's mouth as they watched Airachnid stalk away, not knowing where they were.

They only had a moment of peace before Airachnid popped down scaring them, both of them struggled to get away, " Expelliarmus " the red, magic bolt knocking the spider-bot down.

Arabella grabbed his hand and ran, what Airachnid said sent a shiver down her body, " What fasinating human girl, I'll have you in my collection...alive " the voice sent only evil and fear down the girl's being.

Jack and Arabella swiftly climbed down and out of the trench and hid behind one of the massive trees. She could hear Airachnid jumping over the trench, she had only one trump card and she hoped it work.

Soon they hid behind the ship, as they could hear Airachnid close by, " it's where you'll soon hang both of your heads. "

" Okay Jack, promise me you won't freak out " Arabella said, seeing Airachnid coming closer to them, " freak out! what do you mean freak out!? " Jack yelled, having enough of the whole scenario.

" Just promise "

" I promise "

" even if you see the wings? "

Jack asked baffled. " Wha-what wings? "

" JUST PROMISE " She yelled as Jack turned to see Airachnid grinning at the two humans, finally finding their hiding spot, behind Jack Arabella was transforming into something big, something with wings and claws.

" I promise I will not freak -- ouuuhhhh "Jack's jaws went slack, instead of seeing his magical friend was a 60-foot-tall dragon. It had pearly scales that lined its body, and glittering multi-colored eyes that had no pupils.

It growled at Airachnid, head butting the evil femme away from them, Arabella spotted the leaked Energon, a vivid red flames blasted from her mouth which ignited the fuel. She runs to Jack, using her body and wings to protect him from the explosion.

Airachnid regains her composure as she finally notices the ignited fuel, her purple optics widen in fear as a mighty explosion happens, sending Airachnid flying off and the ship destroyed.

Arabella opens up her wings as Jack steps out seeing the destruction, he finally looks up at the dragon, or Arabella in this case.

" Arabella is that you? " he hesitantly asked, he was freaking out that his friend turned into a dragon, after today, he needed the day off.

Arabella nodded as she tilted her head back to the forest, Jack nodding understanding that they needed to get back to Arcee.

The human teen and dragon walk back but Jack's foot is caught in the web as Arabella roars at Airachnid, tackling her into a fight, trying to snap one of her legs off or better her helm.

Arcee races towards them, transforming mid-air, striking Airachnid. As Arcee was distracted fighting her enemy, Arabella used her claws to carefully cut the webs from Jack.

They watched the showdown between Arcee and Airachnid and watched how the villain was sent flying, crashing the endless rows of trees.

Arcee turned around to see a massive, white dragon next to Jack, she activated her blasters, " Wait Arcee that's Arabella! " Jack shouted, he didn't want to see either of them hurt.

Arcee's jaws went slack pointing at Arabella, " Is that really you " the dragon nodded, tugging her legs and wings to her body, to seem less threatening.

Arabella's dragon form was bigger than her, and might be bigger than Optimus, " I'm guessing this has to do with magic " Arabella nodded again.

" Are you both okay? " she asked, as they reassured her that they were fine.

They watched as Airachnid drilled away to escape, Arabella roared towards the hole and breathed her red flames, hoping that it would burn the spider bot. Arcee felt the intense heat from Arabella's flame.

" So much for closure. "

" Now Airachnid's stuck here on earth," Jack says as Arabella lowly growls. " I'm not sure
that's such a good thing."

" I'm sorry you both had to face my demons today. " She looked at Jack and Arabella, sorry for what they experienced.

" You were pretty fearless there, Jack. " Arabella snorted at Arcee, in an offended gesture which the two-wheeler autobot chuckled, " You too Arabella " petting her snout.

" Actually, I was terrified. Mostly for you. " Arabella started purring when Arcee was petting her snout.

" Ratchet, requesting ground bridge." Arcee watched Jack swat away a mosquito and Arabella watched Jack.

" Need to get my partner far away from any oversized insects." Jack smiles at Arcee" Partner, huh? "

" Junior partner. " Arabella internally smiled that this was all over. " Hey, Arabella wanna show the others " Jack asked, " I think Ratchet is going to have a spark attack " Arcee jokes which you give out a gurgle, sounding like a laugh.

The familiar green portal appears, with barely enough room for Arabella's dragon form to fit in. Jack and Arcee came out first into the base where the others were waiting.

" So how did it go? " Miko asked, she was bored from sitting at base doing nothing. Optimus was about to approach the signal when a series of thuds echoed throughout the hall, they were even heavier and louder than Optimus.

They were getting louder as nearly all the Autobots got into attack positions as they watched a massive white dragon walk out of the portal. " By Primus " Ratchet gasped, he remembered reading this dragon but he couldn't help how beautiful it was despite it being so large and threatening.

It transformed back, and the others could see the transformation as now Arabella in her human form was standing in front of them. " so ... surprise? " and so began the endless questions, oh joy.

A/N:  I'm back from the dead, I left this book on hiatus but hopefully I'll be writing more.

So for Arabella's animagus, it's going to be the Antipodean Opaleye. I think that Arabella's personality fits the dragon breed and they were particularly not aggressive, rarely killing unless it was hungry or being protective.

Here's what the dragon looks like...

comment below if you guys want chapter ideas or special au's that i should add in :)

Thank You for reading, commenting and voting! Hope you enjoy this tfp x harry potter crossover fanfiction