Night guard sans x animatronic reader - Not left behind (just in case if the title was too long and I'm doing FNAF and undertale crossover I know FNAF is not that popular anymore but I want to and I had this idea when I was eating dinner! I have to do it before I forget anyways... Let's go!!!)
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Sans's pov

I got a new job at the Freddy's pizzeria. Huh. A night guard? I'll give it a shot. Besides, that will make me some excuses for sleeping during daytime. I said goodbye to paps and teleported there. I saw boss and he gave me the uniform and showed me around and introduced the animatronics quickly. Not gonna lie but they are pretty neat. Especially the one in the works and service room. Too bad she's still a work in progress. The shift starts at 12 am. I got changed and went to the office. I was just in time because it just turned 12. Let the night begin

Your pov

It turned 12. It's that time again. You were sad that you have to kill them even though they are not the one who killed all of you. They have to get dragged in this mess. The accident is still fresh in your mind.

Flashback

"C'mon sis!" Freddy (I forgot what the kid's names are so roll on with it pls) said and he dragged you by the hand. You were the big sister of Freddy,bonnie,chica,foxy and G.F. (Golden freddy). "Why hello kids! Let's have some fun! Follow me through this door!" Spring bonnie said and you all went behind the door. He locked it and smiled creepily. "Now this is a lesson you need to learn kiddies." He said in a scary low voice. "Never trust strangers." He killed all of you and stuffed you into suits. Freddy was in a bear suit, bonnie in a bunny suit, chica in a chicken suit, foxy in a fox suit, G.F in a golden bear suit and you in a ballerina one (not balora (ps. Forgot the spelling sry))
Then, you were all born. You all attack the night guards for revenge. You were the only one who regrets it. They didn't deserve this.

Flashback end

It was 2 am. You only move at night 2 so you just sat there while hiding the tears/oil (?) streaming down your face. You just wanna be free and you didn't want to kill them. A few hours past and the night is done. The restaurant opened and some kids went rushing in. You just peeked through the door. Foxy and golden Freddy was repaired so they can perform. They perform happily while you just sit here, stuck with nothing and no one. Only empty space. You were going to be repaired soon. You can finally perform soon. Someone went through the door and to your surprise, it was the night guard. "Alright. Gotta fix ya now."

Sans's pov

Boss said I should be the one to fix animatronics to so I can even stay for the day. Well, most of it. I got (y/n) as boss calls her. She was tall, had (f/c) pupils, a (f/c) tutu, (h/c) hair and she looked good. I put her on the table with my powers and started working.

A few hours later...

I was done. She was fixed. Boss is gonna be happy. I sighed happily and called boss and told him the news. They said to just put her on the table and make sure there aren't loose bolts or something. I checked and there isn't. I sighed and smiled. I went to the door and im sure i heard someone thank me.

Your pov

You were fixed. You were happy that you can perform. You smiled and muttered a thank you. Your voice is like a human's not a robot's. He left. You sighed happily.

At night...

It was night 2. You moved at the left door. The parts and services room are close to the office. The door closed. You understood. You looked at the window and saw him scared and was staring at you and glancing at the other door or the camera. You breathed on the window. It made a smoke thing. You wrote on it. Thank you for fixing me 💖 You put a heart on the end. He didn't seem to mind it. He might be scared and thought this was a trick. You smiled gently, hope shining through your eyes. You left and went backstage. They still haven't moved yet. "Hey guys. Can we please not kill this one? He seems good." "No (y/n). We need to kill him." "But-" "no buts" you knew that in the next few nights, they can kill him. The hope on your eyes disappeared and they became the dull ones again. "Okay..." There was a hint of sadness in your voice. You came back to the parts and service room. It was 2 am. You decided to sing.

All this torture will unwind
Take it from out broken crimes
We have no place to go...
Take your turn to run and flee because that's your destiny.
Stop holding back from me.

That's the only part of the song that you liked. In your performance, you have to sing that with Freddy. You went out again and went to the office. The door was open. You looked at the other side and saw that chica was right there. The night guard didn't seem to notice. You ran inside and closed the door. The night guard looked up and was scared to see you there. You smiled and looked at the power. It was 1%. You charged it. Your the only animatronic who can restore and drain power. In fact, you were the most powerful animatronic except for marionette. You smiled and patted his head. He looked so scared. Chica left. You opened the door. You went out of the room and smiled. You went to the stage and saw the others glare at you. Freddy walked to you. "WHY DID YOU HELP HIM?!?!? WE WERE SUPPOSED TO KILL HIM!!!" "We don't need to. I had enough of killing night guards. They are innocent." "NO THEY ARE NOT!!! YOU SAW WHAT HE DID RIGHT?!?!?" "he's not the one who killed us Freddy." "now now! What's going on here?" Marionette entered the room and saw us arguing. You looked around you and the others were looking at the two of you. "SHE HELPED THE NIGHT GUARD!!! INSTEAD OF KILLING HIM!!!!" "now now freddy. (Y/n), you shouldn't do that. You need to kill them, not help them. We need to get revenge." "B-but... The night guard isn't the one who killed all of us! Why do we need to kill them?!?!?" "We need to. One day, you'll understand. Now go!" He disappeared. You ran to the office. The guard was focusing on the camera again. He didn't noticed that you were here. You saw chica on the other side again. You closed the door. You saw Bonnie there. You closed the door. "Hey (y/n)! Let us in now!" Bonnie said and you just looked at him with disbelief. "Yeah (y/n)!!! Let us in!!!!" Chica said and the night guard looked up and saw you. He was scared to death. You took a step closer to him. He took a step back. You now had a good look on him. He was a skeleton with big,black eyesockets with white dots for the eyes. He was wearing the uniform. You took steps until he was backed up on a wall. He was shaking like there was no tommorow. "H-h-hey there b-buddy. P-please d-dont k-k-kill me." He was stuttering like crazy. You smiled at him. "I'm not gonna kill you. Don't worry." You said and petted his head. You were taller than him by a few centimeters. "R-really?" He said, still keeping his guard up. "Yeah. What's your name by the way? I'm (y/n)!" You said and took out your hand for him to shake. "I-im s-sans." He shaked your hand while shaking. You smiled brightly and shook his hand. It's 5 am. "Oh! It's almost time! I'm sorry but I need to go! See you tomorrow night!" "See you." He wasn't that scared anymore. You let go of his hand and looked at his power. It was still high. It was now 6 am. You opened the doors and went backstage. You need to go there now. You joined the others. "(Y/n) why didn't you let us in?" Bonny and chica said in unison and you looked at them apologetically but also a little madly. "I'm sorry but I can't accept you all to kill him. He's harmless. What do we need to do with the night guards anyways?" ( You still didn't know) "we stuff them into suits so they can experience what our life is now." "No! I can't let you do that! Besides, monsters turn into dust so it won't matter anyways!!! And I'm sick of killing  innocent night guards!" You said and kids went in with their parents. Your excited to perform!

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Sry but I need to end it there! Don't worry! I'll do a part 2 soon! Bye potato chips!