Archive of Our Own ^beta

Chapter Text

Hello everyone, especially the Thomas the Tank engine community!
This is my introduction to my Thomas the tank engine humanized AU. this story includes shipping and family dynamics with characters

Many stories on here don’t include many non-main characters to say so I decided to come up with my own
I got a lot of help from @Oneforallartiast. They did a wonderful job on the story plot, characters, and ships :)

If you’d like you don’t have to read this and skip right into the story if you prefer

1. About story and characters:
This is the first part of this AU; this story will be the main one. There will be other stories about different characters in the same AU around the island so if you enjoy this story be on the lookout for them.
Lady is a huge part of these stories even though the events of the magic railway haven't happened thomas never met her. She's essentially the goddess to the engines.
In this AU the characters can turn human then back to their original forms they weren’t always able to do this and have only just got this ability a year prior to this story, because of this they are criticized around the world, it might get to the point that we see our favorite or beloved characters getting attacked, harassed, and emotionally hurt because of this

2. Criticism:
I am open about suggestions and feedback on this story just comment down below.
If you don’t like the pairing or certain characters remember, these pairings are my opinion and if you dislike them you don’t have to read this.

Chapter Text

I don’t know just how it happened; I had let down my guard…

Percy was getting ready for work. He got up earlier than any of the other engines; it wasn't even bright outside. The streetlamps outside shone through the windows of the house. He had put on a comfortable white undershirt underneath a nice-looking button up green sweater, he also had on a nice-looking gray cap and a leather mailbag which was strapped to his jeans. Once he finished getting dressed and made himself look presentable, he then headed to the front door. Before he got to the door, he heard a noise and looked down and was surprised to see his white cat, Whiskers, standing there. Percy chuckled, then he knelt down and pets his fluffy white companion. “I'll be home soon Whiskers, I promise” he said before standing back up and leaving, making sure whiskers didn’t follow him. He then transformed into his train form and coupled onto the mail cars and was on his way to deliver mail.

Later, Percy was almost done with delivering the mail he had been delivering mail for hours now, and all he had was a couple of packages left. As he drove down the tracks he arrived in a small town, as he drove in he noticed signs next to the tracks and some graffiti on walls of buildings, which read, “Mutants!”, “freaks of nature”, and many other offensive names which left a shiver down Percy’s spine. Lately the trains on the island of Sodor were worried since people around the world were making the trains, cars, and machinery seen as outcast and monsters since they had the ability to become human and were worried that they would start a revolution and take over human civilization with their now given powers. Countries around the world were scrapping and killing off the trains, cars, and machinery, that could turn into humans, lots of them having to be brought to the island of Sodor so they didn’t be scrapped since the island was a safe haven for their kind, but even so they all were still scared and people around the world came to the railway and protested about them and were trying to get rid of them for good.

Percy tried not to think about the issues that were happening around the world; many of the engines did, not thinking about it made Percy feel much better and made him forget about the grifiti and signs he saw at the town. Soon he saw Thomas puffing along the tracks, he was pulling Annie and Clarabel who were full of passengers “Morning Thomas!” Percy said happily as he drove down the tracks. He whistled as he drove past the other, getting a “good morning!” from Thomas who whistled back.
Soon he was at his second to last stop, he delivered the mail then walked over to his mail trucks to see where the next package had to go. “Finally the last package, now, let's see where it has to go. Let's hope it ain’t fa-” he held the large package in his hands, his eyes widened, he had hoped he was seeing things, the address was for the Diesel Works, there was never mail for the Diesel Works. He put the box down with a sigh, he knew he had to deliver the package. It was his job so he got back into his train form, clipping onto the mail trucks behind him, and headed to the Diesel Works. As he got closer he gulped worriedly and wondered who on earth had ordered this.

Once he got to the Diesel Works he stopped at the entrance. It was eerie and rusty. He turned back into his human form and headed to the mail trucks. He opened the car and grabbed the package. To be honest, it was a bit heavy. He sighed and hesitantly walked in. He was greeted by the sound of commotion. Music played loudly and the sound of talking echoed through the building. The smell of cigarettes and weed illuminated the air and into Percy’s nostrils which made him hesitate for a moment. He then spots the diesels who were in their human forms.
Arry and Bert were sitting at a table at the upper deck playing cards most likely poker or black jack because soon enough they started beating eachother up causing a bottle of beer to fall to where Percy was and shatter which freaked him out. Arry and Bert were tough, they wore black shirts and black jeans, on the jeans they had yellow chain belts, their hair was brown and both of them had mohawks. Their arms were covered in tattoos, and they also wore a bunch of earrings on their ears, they looked identical. Percy then noticed Diesel who was sitting on his phone as he smoked. He wore a whole black outfit, over it he wore a black biker jacket, over his feet he wore black combat boots, lastly, Diesel’s hair was short and black. Paxton was with Diesel, he actually liked Percy and the other steam Engines but was still part of the so-called diesel gang called the Rebellion.

Paxton saw Percy who was still standing by the door shaken up by the commotion in the Diesel Works. He smiled “Hey Percy! “ he said happily and waved. Suddenly the room went quiet, Arry and Bert stopped fighting, the music was turned off. They all turned and looked at Percy “What the Fuck is a steamy doing here?!” Arry asked as he let go of Bart who fell onto the floor. Percy gulped “H- hey- I- I just have a package that someone ordered here-'' Diesel raised a brow and scoffed “No one ordered a package” he said annoyingly. Percy looked at them, he was puzzled, he knew he didn’t read the package wrong “A- Are you sure? It says right her-""Maybe our boss ordered it,” Bert said as he stood up and grinned at Percy “You can go see, he lives down in his workshop.” Bert was being cocky since their boss absolutely hated steam engines. Percy gulped “O- Okay” he said with a nervous tone. Percy slowly and hesitantly headed for the elevator he then clicked the button on the wall by the big metal doors, the yellow and black striped doors opened, Percy gulped once again.Once the doors fully opened, he carefully stepped into the elevator. Inside he held the package against his chest, he reached over and clicked the button from inside the elevator, the doors loudly and slowly creaked closed and the elevator started to go down to the workshop. He held the box close to his chest, and looked around the elevator. The elevator was dirty and really rusty, there were also tracks so the diesels could use the elevator in their diesel forms. Soon the elevator scratched to a stop and jolted as it did. Percy became unbalanced and almost fell but before he did he caught himself, as he did the elevator doors flew open. He hesitated and gulped hard and slowly and nervously walked into the big wearhouse like basement. The smell of cigar smoke traveled through the air.
There were a couple of empty bottles of alcohol on a table, there was also broken glass which Percy tried to avoid as he went through the warehouse. He noticed a bunch of scrap metal, and also a few cars which were full of used old pieces of metal.

As he walked through the place he could hear the loud sound of welding, “Hello?” he yelled out in his squeaky voice, suddenly the welding stopped, he suddenly heard footsteps approaching and a man turned the corner and was right in front of Percy.
He was a tall and muscular man, he had long black and gray hair which was tied up in a bun, he had a chin beard, and growing facial hair on his jawline. The man was wearing a messy button up white shirt which showed his chest, with it he wore brown suspenders with light peanut brown colored pants.
He looked at Percy with a stern look, he hated steam engines and seeing one in his workshop, his home, made him angry “What do you want?!” he asked angrily. Percy was stuttering, trying to say what he wanted to say, that’s when he noticed the man’s left arm, there's no arm, instead a metal prosthetic arm, but the metal prosthetic arm was different, it didn't have a hand at the end of it, instead had a claw which had razor sharp spikes which helped with grab things easily or kill someone.

Percy held the package tightly and hesitated for a moment before speaking “I have a package- i- I didn't know who it was for- all it says is the address-” before he could say anything else the diesel took the package; it was pretty light for the diesel. He used his claw arm and ripped it open; it was full of tools he had ordered. He grinned and took a look at Percy and stopped grinning “It's mine, thanks little engine, now, run along” he turned away and set the box down on one of the worktables. Percy stared at the diesel, he wanted to say something, anything, he had never seen anyone like this diesel before, he was mysterious.
“Sir?” Percy said in a quiet voice, “What!? Didn't I tell you to run along?!” he asked in an annoyed and angry tone as he looked down at the work in front of him and began using a screwdriver. Percy paused for a second, trying to think of what to say next. “w- what's your name?” He asked nervously as he fiddled with his fingers. The diesel stopped working, he looked at the little engine standing before him, he looked Percy up and down, looking at his outfit, from his gray little cap to his mailbag which relaxed right against Percy's left hip. He looked at Percy's face, he could tell he was a bit nervous, but also curious. The diesel found this quite amusing. “Diesel 10” he simply said, he looked at the other as his eyes widened from the name, Diesel 10 grinned a bit Percy became more nervous “I- um.. I'm Percy '' he said with a small smile and looked away a bit, Diesel 10 snickered a bit from Percy's reaction “Now…” he turned away “Run along” he said rudely before going back to his work. Percy nods to himself, and without another word, he leaves the workshop and Diesel Works, where the diesels and the mysterious Diesel 10 lived.

After delivering the package, Percy headed back to Tidmouth sheds, he was done for today and it was now dark out, he saw all the others arrive to Tidmouth, as he turned into his human form, he then heard a familiar whistle, he looked out of his shed door. he smiled and saw Thomas arrive. Thomas transforms and walks into his shed, he sees Percy and smiles softly “Hey Percy” he said happily and walked over. “How was work?” he asked, Percy paused, he wanted to tell Thomas about the mysterious diesel he met, “I-” suddenly they were interrupted by the sounds of Henry coughing up a storm because of his asthma. Gordon was comforting the other and holding Henry's inhaler “hey, hey just breath, here take this” Gordon said softly and put the inhaler to the other's mouth and pushed down the button as Henry took in a gentle breath and the asthma started to wear off. As Henry's breaths became calmer, he laid his head on Gordon’s shoulder. Henry had been working a lot today to the point where he was having a horrible time breathing and he hadn’t been able to take his inhaler which worried Gordon.

Percy immediately heads over to Henry and Gordon, worried about his mother. “Father, is Mom alright?” he asked Gordon worriedly. Gordon notices Percy was worried, he nods “Henry is alright I promise, he had a tiny asthma attack that's it, there is no need for alarm, little Percy.” He then put his hand on Percy's head and ruffled his hair gently, which always made Percy smile and feel much better. Thomas smiled as he watched the three being a family. He then said “Well, I got to head home, I'll see you guys tomorrow! bye Percy” Percy looks at Thomas “See ya Thomas” he said with a small smile.

A few days later, Percy was back to delivering the mail. He enjoyed delivering the mail, but also loved pulling freight cars and doing other small jobs. He found it enjoyable and doing different jobs everyday gave him the chance to meet different people and hang out with friends. As he continued to deliver mail, he noticed a big package and since it was one of the bigger packages in the car, he decided it might be a good idea to deliver it first. He goes over and checks who it was for and to his surprise it was going to the Diesel Works, he then remembered the last time he went to the Diesel Works and met Diesel 10 and assumed it was for him again which made him excited and feel all bubbly. So, he hurried and got coupled up to the mail car and hurried to the Diesel Works.

When getting there he went over to his mail cars and grabbed the box which seemed heavier than the last one, he hurried into the Diesel Works, when going in the smell of weed inflamed his nostrils. Percy then cleared his voice and nervously said “Excuse me” everyone turned to look at him. Diesel huffed “Back again steamy? With another package?!” he said in annoyance, he rolled his eyes “Hurry up and give our boss the package” Percy nods and heads to the elevator.
The elevator creaks down to the workshop, and jolts to a stop, and the doors open. Percy walks in carefully and looks around, stepping over the uncleaned glass and sees more beer bottles laying around “hello?” he calls out, this time not hearing the welding, and looks around for Diesel 10. He looked around and noticed the man sitting at a table next to metal scraps; he seemed to be focused on what he was doing. Percy then slowly goes over to Diesel 10 and gently taps him on the shoulder, in doing so Diesel 10 jumps in surprise and turns around quickly to punch whoever it was, in which case Percy hides himself behind the box. Diesel then looked, noticing it was Percy “Oh sorry” he said rudely, he takes the heavy box from Percy and sets it on the table “didn't mean to almost punch you” he chuckled “I thought you were someone trying to kill me” “also, I wasn't expecting this package till way later it's pretty early, don’t you have a rout to take?” Percy stuttered and fiddled with his figures nervously “y-yeah, I just wanted to meet you again, I was excited” he admitted. Diesel 10 was surprised. “Well…” he thought for a moment, he thought maybe if he kept this steam engine here long enough he could get him to trust him and that way he could get some info about the other engines and take over the railway. He grinned and looked at the clock, it was 7:32am. He sat down “if you want we can talk for a bit” Percy was delighted.

A few hours go by, Percy told Diesel 10 about the jobs he does on the island of Sodor and about his friends, like Thomas. Diesel 10 listened to him. He admired his blonde yellow hair, his cute face, and the outfit Percy wore. He also liked how nervous the little engine could be at times. Diesel 10 talked a bit about how he uses his claw which he called pinchy to pick up scrap metal and take it to his workshop, he also talks about how he finds most of the other Diesel's very annoying. Percy noticed that Diesel 10 was most likely lonely down in the workshop all by himself “Are you lonely? Being by yourself in this workshop all the time? “ he asked. This surprised Diesel 10, no one had ever asked that before “Sometimes, but it doesn't really bother me” he explained. Percy frowned, suddenly he had an idea “What if I come and see you everyday and talk with you? Then you surely won't be lonely!” Diesel 10 smiled a bit “That would be lovely Percy, you can come talk to me at night, after work, but you should sneak to the back of the Diesel Works, so none of the diesels become suspicious of our little, chit chats since they and myself included hate stream engines, but your pretty nice so I'll allow you here” he wasn't gonna tell him the truth.
Percy was surprised but happy that Diesel 10 would let him talk to him every time “Oh thanks 10!” he paused once he just called him 10 “Is- is it okay if I just call you 10?” He asked as he blushed softly and rubbed the back of his neck. He looked up at Diesel 10 who just smiled a bit “Of course Percy”

A few weeks went by and Percy had been going to see Diesel 10 after work. He and Diesel 10 had been getting close, real close. They were friends, even though Diesel 10 never actually said they were. Percy was drinking hot chocolate as he sat on the couch at the workshop. It had been a long day with lots of mail deliveries. He was watching Diesel 10 sketch in his notebook. He admired Diesel's 10’s long black hair which wasn't in a bun, it fell all the way down to his shoulders, Percy also admired his chin beard, he loved Diesel 10’s appearance and he blushed a bit. Diesel 10 noticed him staring but didn't say anything, recently he had been enjoying the little engine's company a bit too much, not because of the conversations, but because of Percy himself. He didn't know why, but the little cheerful, curious engine made his stomach feet weird, made him have butterflies. He started to think of Percy more than he liked, he thought Percy was… cute.
Suddenly he heard Percy gasp, he turned to him. Percy quickly got up “Shit shit shit, I should be home by now” he said, Diesel 10 got up and quickly grabbed Percy’s coat “Well you better hurry Percy” he helped Percy put on his coat… he didn’t know why but he felt the need to. Percy blushed and smiled softly. Diesel 10 looked at the time “I'm sure you can make up a lie” he said as he walked to the stairs with him. Percy nods, he had noticed that Diesel 10 had become nicer toward him after the first day they met, he loved it and it made him find Diesel 10 more attractive, he had fallen in love with Diesel 10…
Percy looks at Diesel 10 “I'll see ya tomorrow 10” he said, he headed up the stairs. The stairs and back door were only used by humans so they didn’t have to use the elevator to get to the workshop but it’s never used so it’s always locked.

After leaving the workshop and heading outside in a rush he quickly turns into his trainform and drives like the wind out of the Diesel Works. He was driving as fast as he could, it was night and he was driving fast, so fast that he forgot about the sharp turn and without warning he found himself flying off the tracks and hard into the grass and dirt, he was now stuck, and because he wasn’t on the tracks, upright, or un harmed so he couldn’t turn into his human form.
He was embarrassed and felt like a total foul for not remembering the sharp turn. He tried whistling for help, he hoped someone would sooner or later drive by and help, Thankfully, Edward found Percy hours later after taking heavy goods that night, it was around 5 am when he found him. He hurried and brought Rocky, who helps Percy up and to the Steam Works to be repaired.

Once Edward entered the Steam Works with Percy, Victor came over in his human form, Kevin and Luke were also there, they followed behind their father, they looked worried for Percy. “Percy my friend, what happened?” Victor asked in a worried and calm tone. Percy was still embarrassed “I flew off the tracks after forgetting about a sharp turn” he said. That's when Thomas chuffed in, he was worried “Percy! What happened?” He asked as he transformed into his human form. “He crashed after falling off the tracks because of a sharp turn, my friend, “ Victor explained. “Now where was Percy when he crashed?” he asked Edward, “He Crashed close to the Diesel Works” Thomas heard this “The Diesel Works?!” he looked over at Percy “What were you doing around the Diesel Works?!” he asked angrily, he wanted an explanation. Percy tries to think of something to say “I- I was bringing a package to the Diesel Works, they ordered something” he lied, Thomas believed him, but still wasn’t pleased “still, you shouldn't be going to the Diesel Works, the diesels there are devious scumbags, that will use you dry until there's no more information to give them, and they'll use that info to destroy all steamies!” This made Percy cross “I still have to deliver all my mail! Even if it’s for diesel engines! And what about the nice diesel, huh? Mavis or Rusty? What about them?!” Victor and the two kids watched as the two argued, this gave Victor a headache. “They are different!” “Different?! what does that mean-""What is going on here!?” a familiar voice chimed in, Thomas turned and saw Hiro walk in.
Hiro wore a black tux jacket which had gold stringed shoulder pads, the coat had gold at the end of the collars, he had a gold chain from two of his buttons to his right shoulder pad. His coat was cut open at the sides which showed some red, the black tux jacket went down in the front. There was a gold belt that held it together. Underneath was a white button up with a red tie. To tie it all up he wore black pants and shoes, his outfit was just really fancy all together.
Thomas and Percy went quiet and stopped arguing. Victor was pleased to see Hiro and went over to him “Hiro, what are you doing here?” he asked, Hiro frowned “I had to flee my island…” “why?” Victor asked him, looking at him with a sad expression “My home was beginning to scrap all us engines, I didn’t want the same fate, so I had to hurry and get onto a boat without being caught and I came here” Victor was shocked “Oh Hiro, that awful, you can stay here, with me” he suggested, “Thank you Victor, I would like that, very much” Percy and Thomas felt bad for there friend. Hiro looks back over at the two changing his attitude to curiosity and crossness “Now why were you both arguing?” Hiro asked and Thomas looked at Percy “It was nothing” he said rudely before angrily stomping out of the Steam Works. Hiro was a bit surprised “Thomas is never like that” he said, Victor sighed “He is just mad, he will calm down soon” he said and held Hiro’s hand. Percy noticed but didn’t say anything, he was now thinking about Diesel 10.

That night after being repaired Percy showed up at his home, it was a small house surrounded with other identical tiny homes, these houses were for the engines, and engines only. They were paid by the government of the island and are safe for the engines since they had high security, the front and back doors of the homes could only be opened by a key card. Percy was really upset about Thomas yelling at him about the diesels, as Percy walked into the house Whiskers sees Percy and hurried over happily, Percy sees him and smiled a bit “Hey Whiskers'' he said picking Whiskers up, he then sits down on the couch and sighed “Hey Whiskers, I had a bad day… my friend yelled at me over something stupid” the small white cat just looked at him then meowed “They said that I shouldn't go to the Diesel Works for any reason, but there's this friend there that I really like” he explained to his cat “But I shouldn’t listen to him, he hates diesels, yes they hate steamies but some of them like us, and the one at the Diesel Works is nice to me… and… I have a crush on him” Percy couldn’t get the diesel out of his head and had an idea, he was gonna go to the Diesel Works, after what had happened he just wanted to see him. He gets up, setting Whiskers down onto the floor, he gets up and heads to a small room. The room was Whiskers’, the room was small but that was just right for Whiskers, Percy quickly put food into Whiskers’ bowl, and also put water in the other bowl. After putting the bag of food away, he goes to his room where he gets dressed into something more comfortable and not dirty. He was now wearing a green soft sweater and black sweatpants, he pets Whiskers one last time before leaving the house and steaming off to the Diesel Works.

Once at the Diesel Works, Percy transformed back into a human and walked quietly to the back and hurried in. It was pretty late so he had no idea if Diesel 10 was still awake. He headed down the stairs into the workshop, the workshop was quiet and cleaned, ever since Percy had been coming over he had been cleaning up the workshop and he even put a trash can in the workshop for Diesel 10. Percy looked but didn't see Diesel in the welding area, so he must have been asleep in his bedroom. Percy headed to Diesel's room, it was connected to the workshop, he got to the door, the door had a sign that said “Do Not Enter” Percy was only allowed into the room once after asking Diesel 10 if he could clean up the room.
Percy knocked onto the door, he knocked pretty loudly. He heard Diesel 10 from the other side “Mhmm who is it?! “ he yelled “I- it's Percy..” Diesel 10 was surprised and quickly got dressed “P- Percy?” He then opened the door and saw Percy “Percy? W- what are you doing here?” He was worried. Percy frowned “I really wanted to see you, me and my friend got into a fight after I crashed off the tracks and he figured out I have been going to the Diesel Works and-” Diesel 10 stopped him, putting his right hand up in front of Percy's face “Hey, it's alright Percy, your okay, I'll make you some hot chocolate and after you can tell me everything” Percy smiled, he was glad that Diesel 10 was there for him “Thank you” he said and the two head back to the workshop, Percy sat on the ugly worn out green couch, in one of the corners of the workshop there was a small kitchen, there was a counter which had a sink, there was also a microwave and refrigerator. Diesel 10 made Percy the cup of hot chocolate, he walked over and handed him the cup of hot liquid “Here Percy” Percy smiled and took the Hot chocolate “Thanks 10” he said happily. Diesel 10 sat beside Percy as Percy told him about the argument with Thomas, how Thomas hates Diesels “He- he doesn’t want me going here, to the Diesel Works, but I don’t care, I love coming here, a- and seeing you” he blushed softly as he held his hot chocolate with both hands “Your really kind to me, y- your not like the others, your different” Diesel 10 blushes from the confession and smiles sweetly at the engine “oh thanks, your very kind to me Percy and you act so different then the other engines on this island they are so mean to us diesels, they think there so much better... There's something about you that is just so-” Before Diesel 10 finished his thought, he leaned in closer to Percy and before he finished his sentence, he leaned in fully and pressed his lips against Percy’s, kissing him deeply. Percy realized this, but he didn’t pull away and instead kissed the diesel back. As he did he set his cup of hot chocolate down on the coffee table next to the couch with a soft clink.
After a few seconds the two began to make out, the sound of them and the soft creak of the couch could be heard. Diesel 10’s tongue explored Percy’s mouth with a hunger that left them both breathless, his left arm, which was the prosthetic claw, rested beside them, as he shifted, he used his claw to gently grip Percy’s shoulder, holding him in place with an almost possessive touch. “Percy,” Diesel 10 whispered between wet kisses, leaving wet strings of saliva connected from both of their mouths as they parted “You make me want to take you right here~” As there kiss grew more passionate and heated, Diesel 10 carefully maneuver himself, picking Percy up with both his claw and right hand as they continued to make out. He gets up and feels Percy wrap his arms over his neck and his legs around his waist. Diesel 10 carried Percy to his bedroom, their lips never parting, Percy’s heart raced as 10 carried him towards the bedroom. When they finally reached the bedroom, Diesel 10 kicked the door open as they kept making out, he kicked the door closed, their kiss growing even more as they tumbled onto the bed, the room now filled with the sounds of their shared passion and rustling of sheets.

Later Percy was laying in bed worn out; he had just experienced intercourse for the first time. Percy looked over at 10 who was smoking a cigar “”that, was incredible” He said quietly to him, the diesel looks over at him with a sweet smile and nodded in response