" I find muggle history so intriguing " Arabella and Jack were walking out of school, Jack then gave her another helmet that Arcee kept in her subspace, and the two teens prepared to leave.

But before they could, they were approached by Vince. " Hey " The red-haired teen called as Jack and Arabella were pulling out. "Cherry moped."

The two looked back at him as Vince winked at Arabella. The brunette gave him a wary look, but Jack just smirked.

"Uh, this 'moped' has dual carbs and can go 0 to 60 in 3.5 seconds." The black-haired teen replied, smiling from under his helmet.

The two teens then left as Vince watched, his expression changing from a smirk to a dark look as they headed out of sight.

Soon enough the three came to a stop at a red light. Arcee, who had remained silent during the two boys' conversation, finally spoke up.

"Uh, Jack. A lady's vital stats are her own business." She said. Jack just sighed, while Arabella snickered. A voice then spoke up from near them.

"Hey!"

The two teens looked over to see two girls around Jack's age standing on the sidewalk. One of them had pinkish-red hair, while the other had dark yellow hair. Arabella knew the red-haired girl to be Sierra, the girl that Jack likes.

"Nick, right?" Sierra asked Jack, and Arabella snickered again.

"Actually, it's Jack." The teen replied, stuttering a little.

"Jack, sorry." Sierra apologized. "I'm Sierra."

"I know." Jack said, somewhat nervously. Arabella couldn't help but smile at the scene occurring before her.

"You once offered to take me for a ride?" Sierra asked, Arabella looked at Jack confused. When was this?

"O-Of course! I-I-I did! A-Anytime!" Jack said, his stuttering becoming more frequent.

"I'm your guardian, kiddo." Arcee said, moving her mirror to look at him. "Not your wing-man." Luckily the girls didn't hear voice from the bike.

"So?" Sierra nudged. "How 'bout now?"

"Uhhhh....." Jack said, looking back at Arabella. The witch was about to speak up, when the sound of a motor filled the air, and a black muscle car with flames running across it pulled up between the four teens.

"Hey! Small world!" Vince said, noticing Jack and Arabella next to him.

"I'm... having a conversation," Jack said, trying to sound civil, while Arabella just gave Vince deadpanned look, as Vince climbed through his sunroof to meet them at eye level.

"Cheer-captain here might enjoy watching you take on four wheels of a muscle car," Vince said, smirking, while the blonde girl whispered into Sierra's ear.

"Are you challenging me?" Jack asked, surprised. "To a race?"

"You catch on quick, ponch. What do you say?" Vince challenged. Jack said nothing. He looked over at the girls, who were giving him a "go for it" look, and then looked back at Vince.

"Uh..." Jack said and was about to reply when the light changed to green, and Arcee took off, taking Arabella and Jack with her.

"Woah!" They both yelled as they sped away, Arabella was thankful that he was holding on to Jack during the whole conversation, otherwise, he would've flown right off the back.

"You didn't let me answer!" Jack said, surprised and confused by the femme's sudden move.

"Nope." She said simply. "Arcee, we can smoke him!" Jack countered.

"Yup!" She said simply again.

"Arcee, you just don't get it." The teen sighed, annoyed.

"I don't make the rules Jack, Optimus does," Arcee said as they came to a stop at another light. "And Rule Number One in case you missed it: Never use power for personal gain. And that includes horsepower."

"But wait, I thought Rule Number One was to keep a low profile?" Arabella asked

"We have many rules that share top priority," Arcee replied. Arabella was about to say something but was cut off as Vince pulled up beside them again. Jack groaned as he noticed him.

"Vince, maybe racing isn't such a good i-" Jack started, but was cut off when Vince burst out laughing.

"Figured," Vince said cockily. "You ride around like your bike's something special. But it's just a chunky, clunky trike. And ugly." Arabella drew in a sharp gasp, knowing that Arcee was now angry, and could feel the rage as the bike was shaking violently. The light changed to green, and Vince floored it, made a U-turn, and took off in the other direction.

"That's it! The yahoo's going down!" Arcee said, now mad.

"He- Woah!" Jack said, but was cut off by Arcee flooring it, making a U-turn, popping a wheelie, and taking off after Vince.

"Woah! What happened to Rule Number One?" Jack asked, confused by her sudden change in decision.

"Gets bent! Just this once!" The blue femme said, a determined tone in her voice. Arabella sighed, and hoped that he wouldn't get in trouble for being involved in this.

" I should've caught the ride with Raf or at least teleported home " the witch grumbled.

Sierra and her friend were walking when Vince pulled up to them again. "Yo, girls!" Vince said cockily. "Your pal, Darby? He's-" Vince stopped as the sound of tires squealing came from behind him, and looked back.

"Ready when you are, Vinny!" Jack said, a mixed tone of mockery and determination in his voice. Vince smirked.

"Dirt road by Trucker's Ranch. One hour." He said, making the race official. He then hopped back
into his car, as Sierra and her friend also got in, and they sped off, leaving the two teens and Arcee behind.

"Jack, this isn't a good idea." Arabella said, concerned. "What if Optimus finds out?"

"It'll be fine." Jack assured. "It might actually be pretty fun."

"Besides," Arcee added. "It's just this once." Arabella only sighed as the two waited for her answer.

"Fine." She said at last.

Later, Jack, Arabella, and Arcee arrived at the place the race was being held. Vince, Sierra, and her friend were already waiting there.

Arabella dismounted from Arcee, and went to stand with the two girls, while Jack and Vince got into position.

"From here to the next mile marker." Vince said. "Ready?! GO!" Vince slammed the gas pedal and took off, his tires slipping on the pavement as he built up traction. Jack and Arcee also took off after him.

"Well, that was fair." Jack said sarcastically, upset that Vince got a headstart. The two flew past the three teens, who watched as they disappeared into the distance.

Arabella couldn't help but smile when Jack finished the race first and soon they headed back to base. Arabella was walking alongside with Jack and Arcee inside.

"Not a word to anyone," Arcee said as she and Jack came into the base

"Our little secret," Jack smiled, and so did Arabella who placed her fingers on her lips and winked. Arcee smiled as well as she walked off.

"Dude, Vroom, vroom, vroom!" Miko suddenly appeared and cheered towards the teen" And the winner is..."

"Miko, who...who told you?" Jack stuttered as Arabella's eyes widened.

"You kidding? It's all over the school!"

"You beat the pants off that blowhard bully, Vince," Raf cheered

Jack brought Miko, Raf, and Arabella into a huddle, "You guys have to keep this on the D.L., especially from Optimus,"

The next day, Jack and Arabella were exiting the school when Sierra exited behind them.

"Hey! I've been looking for you!" She said as they turned to face her. "The race! How great was that?! I was like, "Yeah! Go, Jack!"

"It.. it was nothing." Jack said, trying to be modest as Arabella awkwardly stood there, as Vince walked up behind them.

"You got that right!" The red-haired teen said angrily, shoving Jack with his shoulder as he passed him. Arabella glared at him but remained silent.

"If you think you can run with the big boys? The Circuit! Tonight!" He challenged. Jack looked behind him to see Sierra, giving him a smile. Before Jack knew it, the two words slipped out of his mouth.

"You're on!" Jack said while Arabella looked at him in surprise. Vince walked away, smirking, " And as well, if I win, I get a date with Arabella "The witch's jaw dropped as Jack's eyes widen even more.

Sierra also walked off, smiling at Jack as she did. Jack then realized exactly what he had done, as Arabella just stared at him shocked and slightly angry.

"Jack!" She said in disbelief. "Are you out of your mind?!"

"How could I back down with Sierra standing right there?" Jack asked.

"That isn't the point!" She said. " That somehow I ended up as the prize and not to mention that street racing like that is illegal! even as a witch, I know that! "

"What choice did I have?!" Jack asked. Arabella just sighed and walked over to Arcee, as Jack followed. The two teens boarded, and they drove off.

The sun began to set as the three headed back to base. Arabella, who was still bewildered and frustrated by Jack's decision, spoke up.

" I still can't believe you agreed to something so stupid, Jack." She said, often she didn't get angry but Jack was involving himself in a dangerous and risky activity.

"What did Jack agree to?" Arcee asked. Arabella gave Jack a look for him to explain the mess that they ended up in.

"It was some kind of... secret racing club. I don't know!" Jack said, flustered by what he had gotten himself into. "But I had no choice! Sierra was standing right there!"

"You always have a choice, Jack!" Arcee said, irritated. "And what part of "just this once" did you not understand?!"

"I know, I'm sorry," Jack said. "But... we're on. Right?"

"We are not on!" Arcee said sternly. " And somehow Arabella ended up as part of the challenge"

Soon, Jack, Arabella, and Arcee arrived back at base. The blue femme went into her room once they got back Arabella went over to the human area to tell Miko and Raf about what Jack did.

Raf and Miko found themselves on the couch. The brunette boy raced on the game with Miko as Arabella stood by the couch, watching them. Bumblebee and Bulkhead were standing around behind them, also watching the game as well. Jack then walked up.

"Hey, Raf?" He asked, causing Raf to lose his focus, and crash his car. "Is there any way I can borrow Bumblebee for an hour?"

"Jack," Raf said, not wanting to get involved in this. "You know racing is against the rules. What if Optimus found out?"

Jack and Bumblebee just sighed

"But Raf!" Miko said. "He's gotta get the girl!" Raf just raised an eyebrow. "And beat the bully?"

"Well...." The preteen said, unsure.

"Come on Raf. Just this once?" Jack asked as Raf looked at Arabella the witch sighed and gently placed her hand on his shoulder, "Whatever choice you make, I'll support it "

The night was cloudy, but the full moon shone brightly in the darkness of the night. Bumblebee and Jack soon arrived at the location.

Many other powerful and fast cars were there. The raven-haired teen, the brunette witch, and the young scout pulled up next to Vince, who was surprised to see Jack with a muscle car instead of his motorcycle.

"Bike's in the shop," Jack said, answering Vince's unspoken question. The two teens side-glanced each other, as Sierra, who was acting as the referee for that night's race, walked out.

"CIRCUIT DRIVERS, ARE YOU READY?!" Called the announcer. Sierra waved at Jack, who smiled in return. Vince just revved his car's engine in anger but smirked at Arabella who ignored his efforts.

"MAKE IT MEAN, BUT KEEP IT CLEAN!" The announcer called again. "FIRE 'EM UP IN 5!"

Jack glared at Vince.

"4!"

Vince glared at Jack.

"3!"

Knockout pulled up, intending to join the race, unbeknownst to everyone present but one person, Arabella noticed the red car behind them, it looked familiar to her.

"2!"

Sierra gave the signal.

"1!"

Everyone floored it at that, and they all took off. At first, the race went as well as anyone would expect, but it didn't last long, as Knockout, picked up Bumblebee's signal.

"The Autobot they call Bumblebee," Knockout said, smirking at his luck. Vince then noticed the cherry red vehicle pull up next to him, and ram into his side, making him swerve.

Bumblebee whirred after seeing Vince's car get knocked back. "What was that 'Bee?" Jack asked as he looked back, not sure of what the scout was saying. " He's saying that Knockout in the race! " Arabella translated, worried for their safety now.

" : We need to get out of here!: " Bumblebee warbled, he was worried about Jack and especially Arabella's safety.

Bumblebee and Knockout then drove up a side ramp, as a blaster appeared where the car gas tank should be, and began to fire.

The yellow scout swerved to avoid the blaster fire and jumped over the barrier separating the race track from the main road. Vince, who was behind them, watched on in shock.

Bumblebee and Knockout landed on the main road, and sped off, with Knockout still shooting at them.

"Can you lose him, 'Bee?!" Arabella asked, as she clung to the car handle afraid.

" :I don't know! I'll try!: " The scout replied. " :But I think we should call the others for backup!: "

" What'd you say?!" Jack asked, not understanding.

" He said that he will call the others for backup!" Arabella shouted at him and the poor guy jumped at the angry witch.

Back at base, Miko and Raf were resuming playing a video game as Bulkhead stood at the same spot watching them.

"Anyone seen Jack?" Arcee asked, as she walked up. The three teens looked at each other before responding to her.

"Not siiiince... We last saw him." Miko said, trying to sound innocent. Raf just shook his head, smiling sheepishly. The femme saw right through them, and her expression became annoyed.

"They're racing, aren't they?" She asked.

"Just this once..." Raf replied.

"Did you know about this?" She asked Bulkhead.

"No!" He replied hastily but fell under her glare. "Maybe... A little."

The blue femme just sighed, but then a call came in from Bumblebee. "You're being chased by Knockout?" Raf asked, wondering who that was, while also translating for Miko. "Sounds like a Decepticon!" Miko said seriously.

"'Bee, do not engage! Your first priority is to keep Jack and Arabella safe!" Arcee said firmly. "'Till I get my hands on him..." She added grumbling under her breath.

The trio was still being chased as Bumblebee let out an oil slick to cover the road. "Slick," Jack said as Knockout swerved.

They drove to a bridge and backed underneath it, turning off the headlights. Arabella held her breath as they heard Knockout above us and then drive off.

"I think we lost him," Jack sighed in relief only to turn as another car drove up "Oh, you got to be kidding me!"

"Darby!" Vince exclaimed as he got out of his car.

"Vince, you have to get out of here. " Arabella got out of the car, trying to get Vince out of the situation that they were in.

" You win, okay? Congratulations. Now go!" Jack shouted, worried that Knockout would appear.

"No, no. Start her back up, loser," Vince argued as he banged his hands the car but kept ignoring Arabella's attempt of getting him back into his car. "We're finishing this race,"

The witch's eyes widen when a giant clawed hand grabbed the orange haired boy. She races up to him, trying to grab him back but she yelped when the other grabbed her as well.

Arabella watched Knockout smirk at her as he tossed her and Vince in the air before the decepticon transformed and landed in the car.

Arabella was in the driver's seat and Vince was in the seat next to her. Both of them were tightly wrapped up in the seat belt, Arabella couldn't reach her wand as she watched Vince be electrocuted before he became unconsious.

" Now sweet spark, don't try anything or nap time like the fleshy over here " he warned and soon they drove off.

Arabella couldn't do anything but listen to Knockout conversation " Breakdown, you'll never guess what I'm packing..." Knockout said as he drove along the road "The Autobot's human pet, the pretty one. And when the Autobots attempt to stage a rescue..."

"He has a breakdown," Breakdown laughed at his pun.

Jack watched as Knockout's form grew smaller and smaller "Arcee is so gonna kill me," he looked as Arcee, Bumblebee, and Bulkhead drove up.

Arcee looked mad as she looked down at her charge "Jack, we need to have a little chat. Arabella too,"

"Later, Arcee," Jack argued " Arabella and Vince got snatched by that slick sports car con,"

" Wait what! we have to rescue her! " Bulkhead said which Bumblebee agreed, the scout was angry at himself for Arabella to get captured by the con.

Arcee remained silent as she transformed into her motorcycle form. "Hop on,"

Back at base, things were quiet. No calls had come through, and Raf and Miko was becoming worried.

"They should've called by now!" Raf said, panicking. "You think Bumblebee's okay?!"

" Don't worry, Raf." Miko said. "Bulkhead won't let anything happen to Jack, Arabella, or 'Bee." Then, they all heard the loud, deep sound of steps approaching. They looked over to see Optimus entering the room.

"We should just tell Optimus the truth!" Raf whisper-yelled.

"Absolutely not!" Miko whisper-yelled back. "We made a deal! Just act completely normal."

" Raf, Miko " Optimus said, as he walked up. "Do any of you know where the others have gone?"

"Why no, Sir. We do not know." Miko said, doing a terrible job at sounding innocent.

"Miko is correct," Raf said, sounding just as terrible. "We do not know."

"Why would we know?" Optimus just looked at them with a wary expression, one of his brows raised.

Bumblee, Bulkhead, Jack, and Arcee drove through town looking for the red con, stopping at an intersection, Knockout drove passed causing the Autobots to quickly follow.

"On your guard, boys. Could be a trap," Arcee warned

"Remember, no shooting," Jack added

Arcee pulled over "Speaking of safety. Here's where you get off,"

Jack got off as Arcee peeled off after Knockout.

Bulkhead and Bumblebee transformed, Bumblebee quick to bring out his blaster.

Arcee climbed a water tower to get an aerial view.

Knockout blinded the bots with his headlights causing enough distraction for Breakdown to make an entrance. Arabella watched Bulkhead and Bee fight Breakdown as Vince was still unconsious.

As the bots fought, Knockout noticed the lack of a certain female Autobot "Hmm. Where's the two-wheeler?" Knockout wondered

Arcee jumped down on Knockout's hood. " Arcee! " Arabella yelled, happy to see the blue and pink Autobot.

"Hey, watch the paint!" Knockout growled and drove off with Arcee holding on.

Jack was still on the sidewalk as he watched the spectacle. "That's my girl," he cheered as Arcee was quick to transform and follow after Knockout once she was knocked off.

"Uh, Breakdown, in case you're looking for me, things got messy, so I hit the road." Knockout informed "One scrape is enough for today," Knockout noticed Arcee getting closer and sped up "Eat my dust," he was knocked to the side as Optimus hit him from the side.

Arabella held on to the seat belts as Optimus blared his horn and rammed into the red 'Con, causing him to spin out and get stuck in a ditch.

He tried to reverse, but he was too deep inside. He also couldn't transform due to having two occupants in his cab. He was stuck and had nowhere to run. Optimus transformed and walked over to Knockout.

"Optimus, Knockout has a hostage and Arabella," Arcee said over the comm.

"Understood." Optimus replied with a frown, knowing that Arabella is in the car, and picked Knockout up.

He ripped his door clean off, causing the con to yell out in pain. The Prime reached in and pulled Arabella out which she let out a relieved sigh and smiled softly at the leader then placed both Vince on the ground next gently as the witch was sitting comfortably in his servos.

Optimus let the Knockout go, who transformed and glared furiously at the Prime.

"DO YOU KNOW HOW HARD THAT IS TO REPLACE?!" He yelled in anger but gasped when he saw the others join him.

Not wanting to have his paint ruined even more, he fled. Arcee and Bulkhead walked up, while Bumblebee rolled down his window, revealing Jack.

"Optimus, this was my fault..." Jack admitted sadly.

"We must get this boy to safety. Explanations can come later." Optimus said firmly. "From all of you." The others looked down, knowing how disappointed their leader was with them for breaking his rules.

A groan sounded out from Vince. Arabella looked down and saw that Vince was beginning to stir.  "Ugh... How did... What happened...?" Vince groaned as he woke up.

He fully regained consciousness to find a large metal being with blue eyes looking right at him.

"What the?!" He shrieked in fright, " O-oh heck no " Vince got up and quickly ran from them. Before he could get far, a magical bolt hit the back of his head, making him go as stiff as a log and collapsed. Arabella was holding her wand near her waist as she lift her arms up.

" That should take care of his memories, he won't remember a thing from tonight " Arabella explained which Jack sighed in relief, " I thought that Vince would spill out about the Autobots "

Arabella was sitting back of Bee's car form after placing Vince in the car as well. She heard Vince slowly wake up, " Wha-what happened? " he groaned.

" Some guys jumped you under the bridge. They tossed you into their trunk, it must've been some kind of initiation " Jack explained, as he was pretending to drive Bee.

" Really? " Vince asked, unsurely. " Yeah, me and Jack found you knocked out by the side of the road," Arabella said and soon they arrived at the bridge.

" I got to be honest, after what I saw tonight, I'm thinking racing isn't my thing," Jack said as Vince leaned down to the window.

" I hear ya Darby, hard to win race, driving a pedal car " Arabella glared at the bully. Bumblebee pressed the accelerator pedal, leaving smoke for Vince to cough on.

" Don't listen to that bloody idiot, you're much better than that muggle's car " the pretty brunette complimented, Bumblebee became flustered and the car heated up. Jack subtly rolled his eyes but smiled.

The next day Arabella was reading her magical history book which was enchanted to look like a teen magazine, she noticed Jack and Sierra riding around town.

The witch shook her head in amusement before reading back at her book, unknown of a certain minicon drone flying in the air, recording the unexpecting witch.

A/N: This was probably one of the longest chapters that i wrote. Oh no, Laserpeak is stalking the Hufflepuff witch, what is Soundwave up to?

So for Arabella's animagus, due to everyone's comments and votes, I decided on a dragon. The dragon is going to be an 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.

I'm going to make the dragon form big enough that the cybertronians can ride on the dragon and even fight the Predacons in future chapters. Comment on suggestions and opinions about this

Here's what the dragon looks like...

comment below if you guys want chapters 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