A/N: So, may change it back to a Optimus x OC story.... but for now it's just a crossover story cuz no one has commented otherwise..... well, as of 12/13/2018.... if you comment afterwards, I will read it and I will still take it into consideration... 

Now..

ON WITH THE FIC

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As Rachel and the other two mechs arrive back at base, their 'welcoming party' waits patiently for them to walk through. Ratchet quickly goes to Ironhide and leads him away. As they leave, Rachel, who was perched on Wheeljack's shoulder, releases a yawn. The Wrecker turns an optic to her, then towards the large red and blue bot that was standing by a platform, facing them.

As they walk over, Optimus turns his optics towards the girl, then Wheeljack. "Wheeljack, how much energon were you able to accumulate?" His voice has a hint of knowing behind it, and Wheeljack gives a smirk. "Nearly a quarter ton. Maybe more." Optimus' optics slightly widen, but he hides it.

Wheeljack's expression turns grim suddenly, and the Prime catches this. Gesturing his optics towards the drowsy human on his shoulder, the mech turns to Optimus with a worried expression. Without hesitation, Optimus extends his servo towards his shoulder. "Rachel."

The girl slightly jumps and blinks. Gazing up, she smiles and slowly stands. Carefully, she walks off of Wheeljack and onto the Prime's hand. "Take it easy, kiddo. And, uh, thanks for the 'save'." The Wrecker smirks, and Rachel smiles at him. He then turns and walks away from the hanger, heading out to clean up his ride after the battle. It only suffered minor external damage, but he needed an excuse to excuse himself to allow Optimus to figure out what was eating her.

Rachel gazes up at the mech before her, her eyes barely open. She gives him a soft smile. He doesn't return it, but instead begins to walk towards the berthroom hall. As he makes his way towards the last large door on his right, he steps in, gently pushing the large metal door open. The room is large and a few pathways line the walls that sit at optic level with the large bot.

Moving his servo up, he allows Rachel to slowly climb off and stand on one of the paths. She stretches and yawns, then lazily leans against the railing. She gazes after the mech as he closes his berthroom door, arching an eyebrow. As he turns to face her, his faceplates soften, and the girl huffs. "Okay, okay. I'm busted..." She lays her head on her hands on the rail. Closing her eyes, she lets out a soft sigh.

Optimus walks over and gazes at the girl, his optics expressing his worry. "Rachel, you have not been sleeping well for quite some time." Rachel gazes up at him, and her eyes slightly glare at him. "Listen, Optimus, I would rather not talk about it, okay? It-It's just...." She huffs, then straightens. "I-I... I don't need you guys to worry about me. I'm fine. I have had nightmares before, and they go away. You don't have to worry about me, it doesn't last, okay?"

She rubs her arms and gazes down, causing the Prime to offer a servo towards her, gently rubbing her back. She gazes up, the tears obvious. "Rachel, I understand why you would want us not to worry, however, you have become part of this family here, and therefore part of our responsibility is to make sure you are fine. That includes your sleeping habits." He removes his servo and gazes down. "I do not know how to help you, however, if you need to speak about anything, please know that I will always listen."

Rachel looks over him, then meets his optics with her eyes. She takes a deep breath, but a loud siren interrupts her before she can speak. Optimus' head snaps up, and he suddenly returns to his steely face leader status. Rachel huffs, blinks, yawns, then straightens up. Her whole demeanor changes and she swiftly leaps over the rails onto Optimus' outstretched servo.

He lowers his servo and she jumps off. As he stands, he opens his berthroom door and Rachel rushes out, down the hall, then swiftly turns into her own room. Just as Optimus passes by, the door opens again and out walks Rachel fully dressed in her combat uniform, courtesy of a certain worried bot.

(I will explain more about this after the chapter in an A/N)

Racing out after the large mech, she swiftly climbs up his leg, swings onto his chassis, then stands tall on his shoulder. They walk into the main hangar where everyone was gathered. Lennox was standing on the large platform, Sam Whitwicky by his side. Raf was sitting at a desk on their left typing away. As the leader of the Autobots enters the large opening behind the two humans, Rachel swiftly leaps off and lands next to them, surprisingly silent despite the metal on metal contact.

Raf is the first to speak to all four present. "It's a cybertronian life signal, faction unknown, however large traces of energon seem to be leading to it." Lennox then adds on. "It must be injured." Rachel moves towards the map and points in front of the moving life signal. "That's San Antonio. If we don't act now, it's going to head straight into a populated area." Finally, Sam interjects, his arms crossed. "We can't just fly in there. It would be too obvious even that far from the city. E-Even then we wouldn't make it in time and we would have to risk evac of the whole city."

The girl turns, eyeing Optimus who was gazing at the map, deep in thought. However, a large servo claps down on his shoulder, and Ratchet's voice echoes behind him. "It's a good thing I finally finished my project." Optimus turns and gazes at his friend, confused. Turning his optics to Raf, Ratchet nods. "Fire it up, Rafael."

The young boy nods, types a few things, then turns his eyes towards a large lever. It slowly lowers and a loud noise echoes around. Against the wall in front of Raf, a large, green, swirling vortex appears, seems to flicker for a moment, then steadies.

Optimus' optics widen, and he turns to Ratchet. "A ground bridge." Ratchet simply nods and Raf quickly speaks up. "It's already locked on to the Cybertronian's location. WE may want to hurry, it's almost at the city!"

Rachel nods and quickly rushes down the catwalk. She reaches the ground and, before she can say anything, Eps appears and hands her a weapon. They both say nothing as they check their guns and Lennox joins them, Sam not too far behind. 

Within minutes, every human is ready, and Optimus stands behind them. Behind him, every Autobot that has made it so far stands, waiting for orders. Wheeljack stands by Bulkhead, the two holding a ready look on their face. Next to him stands Ironhide, looking almost new. A permanent scratch through his face plates is under his left optic. On his left stands the Arcee Sisters, Chromia standing the closets to Ironhide while Elita-One and Arcee only smirk at their sister. Lastly, by their side, is Sideswipe, who looks at Rachel and winks.

The girl smirks, then presses a button on a part of the armor around her neck. A helmet slowly materializes from the base of her skull all the way to cover her entire head. Ratchet lets out a sigh that is barely heard, but Rachel smirks. He was always worried it wouldn't work.

Optimus gazes around, then speaks. "Autobots, we do not know who this may be, but what we do know is that the Decepticons may have also found the trail. We must take every precaution. Ratchet will stay and prepare sick bay. Everyone else, transform and roll out!"

Rachel rushes towards the portal, however as a silver car drives past her with its door open, she swiftly jumps in. Sideswipe drives them through the portal and the minute they reach the other side, something explodes in front of them. Dirt covers Swipe's hood and he swerves to the right. Rachel tightens her grip on her gun and grunts as she is slammed against the door. 

As another blast rocks through the cab, she feels Sideswipe begin to shift. "Hold on, girl!" He shouts. Suddenly, she feels weightless as she goes tumbling through the air. After one flip, she cocks her gun and reaches out. Feeling a servo meet her hand, she tucks her head in and rolls across the palm of Sideswipes servo. She quickly jumps to her feet and jumps up while Swipe thrusts his servo up. Stretching one arm out, she grips part of his shoulder and climbs up. Once up, she gazes around as Sideswipe switches his servos to blasters. He fires at the Decepticon drones, nailing each one in their red-triangle visors.

The scene before her was fire filled and energon covered. Every once in a while, a small puddle would ignite and explode, adding to the fire in this small forest. Behind the drones stood Starscream, Breakdown, Blackout and, of course, Barricade. Rachel glares at the false cop car and growls. Sideswipe hears this, and turns to her. "Don't let it control you, Rache!" However, before he can say more, he yells in pain as a blaster shot launches him back. However, Rachel pushes off his shoulder and launches herself right into battle.

Her sights fall directly on the left optic of the one who first attacked her. She pulls the trigger, then curls herself to roll across the ground, smirking at the sound of painful shouts above. Skidding to a stop, she dives to the side as a large ped crashes down towards her. Sprinting off as she lands on her feet, she reaches down and presses another button on her hip. Holding her hand out next to it, a small sphere rockets out and lands in her palm. Pressing down on a circle with her thumb, it lights up red, and she throws it straight up as another ped comes crashing down towards her.

She barely dives out of the way as it seems to stick to the bottom of the large metal foot. It makes a click, but as the ped hits the ground, an explosion blows out from under it and shreds it. Barricade hollers in pain and glares at the figure that was rushing away. Falling to one knee, he growls and swiftly opens fire towards Rachel. Optimus, having decapitated Blackout for the second time, sees this and rushes over to stop him, but slams into the crippled Decepticon a minute too late.

Three shots fly through the air, and Rachel sees the reflection in her visor. She grunts and veers right as the first flashes past her left. It explodes before her, and she ducks down as the second skims her back. She slightly shouts at the heat, but rolls instead and stands to keep moving, however...

The third blast was only inches behind her now.

It slams into the ground, only two inches from her heels, and sends the girl flying. She crashes into a tree and slumps. A groan escapes her, and she shakily stands. A voice echoes in the helmet, and she holds on eye shut as a small stream of blood runs down it.

.:Rachel! Rachel, answer me, damnit! Are you okay?!:.

.:Her vitals are stable, Will, but she may be in shock!:. Ratchet.

The girl huffs, and she glares before her. "I-I'm alive, Colonel Lennox, now please stop yelling." Her eyes were locked on the single optic of Barricade, who was somehow successfully survived Optimus Primes attack. After delivering a well aimed shot to the Autobot leader's chest, he turns his barrel back towards Rachel.

.:Rachel! You have to move, now!:.

However, the girl stands her ground, and glares at the Decepticons. "It's time to get rid of a pest." He says before releasing a single shot just as Sideswipe barrels into him and Optimus fires towards his other leg.

However, even as Autobots rush to either stop the shot or rescue the injured girl, it soon grows too close. Rachel refuses to close her eyes, and they widen as a signal appears on her screen. It seems to appear over her, and she releases a gasp.

The explosion rocks the area around them, and Optimus' optics widen at the impact spot. Fire and smoke block him from seeing the ending, and he releases a loud battle cry before switching his canon to a large blade. He rushes at Barricade, who had thrown Sideswipe off, and goes on the attack. He relentlessly attacks, startling nearly every bot on the field.

However, back at the impact zone, the young woman slightly uncurls to gaze at the large mass around her. Looking up, she finds herself gazing at a silver face scrunched up in pain. As the optics open, they barely release a soft blue light. The mouth of the bot curls into a painful smirk. "Hey.... Y-You alright?" He asks, a small drop of energon falling from his lips.

Rachel nods. "Y-Yeah...." She gets dizzy, but catches herself as the mech slowly unwraps himself from around her. He releases a grunt and barely holds himself up. Rachel slightly huffs, and feels herself stumble. A servo suddenly appears around her, and when her eyes allow themselves to open again, she notices that the wounded mech was holding her with his free servo while the other was around a severe wound on his side.

She nods her thanks, and he smirks again. However, it twists and he groans, but a large servo steadies him. Rachel can't help but smile at the large red and blue bot. "Thank you for protecting our friend." His voice was slightly suspicious. His optics fall on the mech's shoulder, and his tone softens. "What is your designation, soldier?" The wounded mech gazes towards Optimus, his optics widening, before closing in pain again. As Optimus holds him steady once more, he opens his optics and replies.

"The name is Smokescreen, sir."

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A/N: YEET THANK YOU ELSCONES FOR COMMENTING YAY

Also her suit was built by Ratchet by secret request of Optimus Prime since he knew he couldn't keep her out of battle. It is equipped with grenades made by Wheeljack, cybertronian weapons designed for humans by Ratchet, and can even transform into different clothing to blend in at will. The helmet can materialize over her head at the push of a button, but it has to be pushed by someone that has DNA permission granted to them by Rachel. It senses her vitals and emotions and can contact the bots from anywhere on the globe..... anywhere

So I hope you enjoy this (i lost track of time today and almost didn't get this up T^T)

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