"H-hey Undyne, could you help me move the cages downstairs please?" Alphys asked Undyne as they stared at Dani and sans sitting on the bed.
"But I wanna hear-oof" Undyne was cut off by Alphys elbowing her in the side, signaling that they needed to leave.
"Yeah, ok. We'll be right back guys." Sans nodded at the two while Dani winced trying to get into a more upright position on the bed.
"Well," Dani sighed, refusing to make eye contact with sans. "The first thing you should know is I'm not totally innocent. I've had to do things I'm not proud of for the sake of the people I care about." She looked at sans out of the corner of her eye and saw him staring at her, nodding her along.
"Alright where here goes. Hopefully this will answer all of your questions. Some backstory on my sister and I first. We were abandoned when I was 9 and Kris, my sister, was only a couple of days old. We wandered through the streets in the middle of a desert before reaching the town we would soon call home, Sun City. I was able to make it to the outskirts of the town before collapsing with my sister in my arms. When I woke up we were both in a bed in an empty room. There were no decorations on the walls just a bed and a night stand. When I looked to the side I saw a man asleep in a chair next to the bed. He was wearing a lab coat and a very deformed white mask. At least I always assumed it was a mask because how could a human have a face like that? Anyway I tried to stand but was too weak, and the bed creaking woke the man up. He was very kind but couldn't speak so he wrote on a pad of paper that was in his lap. 'How are you feeling?' I tried to speak but my throat was too dry and coarse I couldn't even let a sound out. He smiled such a crooked yet kind smile and got me some water. After drinking through nearly an entire gallon I tried again and croaked out a 'What happened?' he explained that he found me collapsed on the side of the road holding a baby and he rushed me back to here to his house to give us medical treatment. He also explained that other from severe dehydration and heatstroke, my sister and I would be fine. He and I talked for hours, I learned that his name was W.D. Gaster and that he was the royal scientist of the whole region and he worked closely with the queen. He was obsessed with time travel and especially interdimensional time travel. He also talked warned me about soul corruption and his job as judge. He explained how corrupted souls come onto the region and he baits them to the judgement hall where he can cleanse their soul. I didn't know what he meant at the time but I would find out soon enough. He also showed me his ability to do magic and how the judge is the only one in this realm that can use it. When one judge dies the next inherits the ability. Somewhere in our conversation I fell asleep again. Next time when I woke he wasn't there. I was awakened by my sister's cries for hunger. Luckily I was able to stand this time and managed to look for a kitchen. Fortunately the house was small and I was able to find the kitchen quickly. He had left some money to go buy food at the store a couple of doors down. I also noticed that he had left some clean clothes for my sister and I. After getting dressed we left for the store. Everyone in that town was quite friendly and smiled and waved as we walked by. I remember feeling so at home. We went to the store and even made friends with a few of the neighbors. I asked about Gaster and they all pretty much said the same thing. No one knew where he came from he just showed up one day and moved in. He's very nice and smart but he practically lives in his lab a couple towns away. No one also knew about his face or why he can't talk. Gaster came home that night and told us, through the notepad of course, that he had told the queen about us and she agreed that we should stay with him if we had no other place to go. I asked him why he was being so nice to us and all he said was that we reminded him of two goofy brothers he used to know. Well, years passed and we lived happily with Gaster, he taught me about how to use magic, even though I didn't have any, he taught me about how he controlled it and how he used it to heal and protect himself from corrupt souls. As my sister got older she became keener on baking and loved to do it, often times she would bake cake for the silliest reasons, and even though they weren't quite edible, Gaster and I choked them down to make her feel good. He even taught us both sign language so we could talk to him without him hurting his wrist from writing all the time."
Dani stopped when she heard a small hiccup from next to her. She looked over and saw sans with his head in his hands. A single blue tear rolled down his cheek.
"Are you ok? sans do you want me to stop?"
"N-no please, go on. I'm not sad, you just have no idea how happy your story is making me." sans turned his head towards Dani and saw his smile glow like she had never seen it before. She nodded and continued.
"Well we lived happily like that for about 10 years. When I was 12 Lisa and her family moved in. We were best friends and did pretty much everything together. We did gymnastics, played video games, watched anime, and went to school together. She was always there for me…" Dani realized there was drops of water on her hand, she looked closer and touched her face, she didn't know when but she had begun to cry too. Sans wrapped his arm around her shoulder and she continued.
"7 years of friendship, 7 years of being inseparable. All of that gone the day SHE moved into town. Lisa had an older brother, Brad, who was slightly older, only by about a year. Her brother was the only person closer to her than I was, and I understood because I was the same with my sister. Well he fell in love with a corrupted soul that had drifted into town. You see there is a way to potentially save corrupted soul before they get cleansed but no one dares to try it. It's called soul saving. When an uncorrupted soul tries to save a corrupted one they can open their souls to the other, allowing them in. Then it's a matter of which soul is stronger. If the uncorrupted soul is stronger, they can pull the other soul out of corruption. However, if the corrupted soul is stronger… they too are dragged into the madness. And that is how Lisa's brother's soul became corrupted. He thirsted for blood after he was corrupted, he only felt madness and had no conscious. He killed his own parents while Lisa was over at my house one night. I remember her frantically knocking on my door an hour after I thought she had gone home. When I finally calmed her down she explained how she thought something was wrong with Brad's new girlfriend. Her eyes where always bloodshot and she gave the most menacing looks. I had known enough about corrupted souls at this point to know what she was and now I feared she had dragged him down too. I told Lisa to stay and watch Kris while I went to tell Gaster, who was still at work. I ran to the judgement hall, hoping I wouldn't get there too late. When I got there Gaster was in a fierce battle with Brad's girlfriend. It looked like Brad was on the ground, wounded, and unable to help. It was then that I saw what "cleansing" a soul meant. Gaster had summoned one of his Gaster Blasters and aimed it at her. I couldn't believe what I saw, I screamed for him to stop but it was too late… She fell to the floor…dead. He saw me and dropped his glowing hand. I have never seen him look so distraught. I started screaming at him, telling him how he had no right to do this to people, that there had to be another way. I didn't notice that in all my fury, Brad had crept up behind me, before I knew it, Gaster had teleported behind me right as he was about to wedge a butcher knife into me. It went into Gaster instead. Even as he laid on the ground bleeding he kept signing, over and over, 'I forgive you.' Then he disappeared, leaving behind dust. I didn't know where his body went but all I remember is feeling so angry, scared, confused, and sad. This was a bad time to mess with me but Brad did and before I knew what I was doing, I threw out my hand in front of me and sent him flying into a wall. I remembered everything Gaster had taught me and I was seeing red with rage. I flung him from wall to wall, launched bullets at him and hit him with any debris that was laying around. I heard Lisa's scream to stop before I finished him off. She knelt by her brother crying saying she could save him, I tried to stop her but it was too late. She was too weak and he used the last bit of life he had left to corrupt one more person, my best friend. As he died she became rotten, the most corrupted soul I had ever met. She looked back at me with her newly red eyes before she picked up his butcher knife and disappeared. I ran straight home to make sure Kris was ok and she was but I was scared that she wouldn't be for much longer. After that night, months passed and I saw nor heard anything from Lisa. I knew she would be back so I locked myself in my room every day for hours practicing magic, and slowly getting stronger so that I could protect my sister one day. I…I should have spent more time… with her… while I… had her…" The sobs where flowing out of Dani in hiccups now but she struggled to finish her story.
"One day I woke up to Kris saying breakfast was ready. I followed her downstairs and saw a stack of nearly edible pancakes. She smiled while I sat down to eat. That's when the doorbell rang and she got up to get it saying she had invited someone over. It only took me a second to realize who it could have been. I ran to the door but it was too late. There was Lisa standing there with a faux smile while my sister greeted her. I screamed and threw my hand up but quicker than I could throw her back she dug her knife so deep into my sister's stomach that it showed through her back. 'An eye for an eye.' She winked before bolting from the door away from the house. I ran to my sister's side, trying to heal her but it was too late. She looked up at me with the same little helpless eyes that she gave me as we wandered through the desert all those years ago. She touched my cheek and whispered 'Forgive her.' Before finally closing her eyes. After that, I knew no one would ever suffer at Lisa's hand again, this would be the last time she would ever hurt me again. She showed up at the judgement hall not too much longer after I did. This is where it would all end. And it did, sort of. I killed her with the first shot of my Gaster Blaster. But right when I thought it was over, I realized that it was too easy. That's when the first reset happened. I don't know how Lisa had obtained this power but she was able to reset timelines at her will. The whole reality started crumbling around me and before I knew it was back at the judgement hall watching Lisa arrived. She had a smirk on her face and told me about how her brother's final gift to her was this incredible power to reset timelines. How, because of him, she was now a god amongst mortals. I asked her why she didn't just go back to save her brother and she said she could only go back as far as he last save. When he gave her the power and died, that was the first save. She had to watch her brother die over and over before she learned she could save in other places. Then she charged at me but I was able to quickly dodge before sending her flying through the air. 'Oh you want to see something fun? Watch this!' she closed her eyes and reality started fading again, next thing I knew I was waking up in bed again with my sister at my door telling me to come to breakfast. I thought it was all just a bad dream and ran out to hug my sister. She asked me what was wrong but told her it was just a bad dream. But it wasn't. Everything happened the same way, I ate, she answered the door, she died, and Lisa ran. This time when we met at the judgement hall she was already there waiting for me. 'Aren't I so nice, I got to let you see your sister again. Lucky you.' Those where her last words before one of my bullets went straight through her skull. The next two times she never made it past my blasters and the fifth time… the fifth time we ended up here."
Sans was able to clear his head a little and wipe his tears. Gaster…lived? Dani looked at him questioningly as she wiped the tears from her eyes.
"So sans, why where you crying?"
Sans chuckled lightly before staring into the distance.
"Because I knew Gaster too."
Dani gasped at this reveal and nudged him to go on.
"Gaster was the royal scientist before Alphys, and he was also… my dad."
Dani couldn't believe what she was hearing. Sans continued.
"Gaster raised Papyrus and I much like he raised you and your sister, he never had a family of his own so when he found Pap and I, he took us in. Alphys and I where his lab assistants in this lab for many years. One day he created a time machine that would make him cross other dimensions and timelines. He went in and never came back. The machine exploded and we thought he had died, but it turns out, he hadn't." Sans looked over at Dani with tears welling in his eyes. Dani hugged sans tightly as he wept and sans was happy to know that he had lived a good rest of his life he only wishes Papyrus was still alive to hear the good news too. The two held each other and cried and although their pasts had broken them, they knew that together, they had the strength to go on, if not for them, than for all those who would want them to.
Phew! What a long one that one was! Obviously the whole Gaster being sans dad isn't canon but I like the idea so I put it in. I hope you all liked it and I will try to post more as often as I can, have a happy valentine's day everybody! Thanks for reading!