Greetings. I'm Chara. Welcome to the Void. You must be so confused. You must also have questions. How did I get here, why am I here, where is everyone, where's my family. Do not worry Dr. Gaster, your family is safe, you don't have to panic. You are here because you have died, but not fully. Your soul still resonates with life. You can actually thank the Void, Doctor. This place is what is keeping your soul together, keeping you alive. You are also here because you have been unconscious for a long while now, and time has passed. And in the time you've been out of it, you have been forgotten, discarded from the memories of all the monsters of the underground. Even your own family forgot who you were and what you did for them. Except for him.
Chara pulled up a screen in front of them, showing Gaster's oldest son walking around in Snowdin. "He is special, Doctor. He still remembers you and what you've done, but imagine trying to tell people who you are when they don't even know who you are. People will just think you're going crazy. That is what he feels, and it has dropped his HP significantly." Gaster tried to check his son's stats, at the same time taking what Chara had filled him in on, only to be cut short by the child next to him. "1 ATK, 1 DEF, and 1 HP. He is the weakest monster in the Underground." The former Royal Scientist tried to reach out to his son, trying to pull him into a hug and tell him that he was still there, but nothing worked.
"It must be a lot to take in, but you brought this on yourself, Doctor. You were told that the Core was unstable, about to overheat and destroy the entire underground. But you wanted to continue with what you started. You wanted to be selfish and finish your own project, instead of stopping it." Chara said, the scientist lowering his head in guilt. "I just wanted to give the monsters of the Underground more. I wanted them to have more hope." He said, realizing that he didn't help anyone. "And look where that path took you. Taking all of your time just to finish a great project, ignoring your family and their needs, just to fall into your own creation. Now, you have your son in suffering from depression, everyone forgetting who you are, and other people taking all the credit for your creation." The former child said, taking the screen away from view. "I-I didn't realize I was actually hurting people..." Gaster said, tears welling up in his eye sockets.
"The Core was a success and the monsters of the Underground gained a little more hope. But at the same time, he lost more and more. Should you be proud, or still be filled with shame, leaving your oldest son to care for your youngest. Just leaving your family without warning." The child soon brought up another screen. On it was a human child like herself lying on a bed of flowers. "A-another human?" Gaster asked, wondering which soul this was since he was unconscious for a long while. "This is the seventh human to fall, the last human soul this world needs," Chara said, making Gaster jump up in surprise. "This is already the seventh soul?! When I was working on the Core, we only had four souls!" "Like I said, Gaster, the time has passed since you've been gone," Chara replied, a smile growing on her face. "Why are you showing me this?" Gaster asked, seeing the odd smile on the child's face.
"I will guide the child through the Underground. Helping them through and teaching them how to survive in this world." Chara said, the Void seemed to get darker, darker, yet darker around the former Royal Scientist. Gaster's breath increased in speed as he saw Chara's red eyes glow in the darkness. "I will teach them that in this world, IT'S KILLED OR BE KILLED!" Chara said, disappearing into the eternal darkness of the void. "No! They are kind beings, why would you hurt them!?" He tried to yell to the former child, but there was no response. The screen Chara showed him of the human was still there, the human was finally was waking up. Gaster swore he saw a silhouette of another child. Why would the child want to hurt the monsters, what was the reason?
As time passed, Gaster was forced to watch the seventh human kill every monster in the Underground. Seeing the human's knife covered in dust, they were certainly DETERMINED to reek havoc in the Underground. But he knew that Chara was behind all the bloodshed, all the death. He fell to his knees as he watched his youngest die at the hands of that... that thing. The killer finally made it to Judgement Hall. It was just as he remembered it, the twilight shining through the windows and the long walk to the Throne Room. Something that was different was that his oldest son was standing there, confronting the human. Gaster was impressed with the skill his son showed, even with one of everything in his stats.
Soon, he fell just like the others. His dust covering the hands of the child, that murderer. Gaster realized that Chara was in full control, even seeing her green sweater once and a while. She was the monster. She was the murderer. She killed the king without giving him time to react, then, an odd sight showed. The flower from the Ruins was actually begging for mercy. It was like it wasn't the same person anymore. Of course, Chara never showed mercy, not even a sight of it.
The screen vanished, surprising the former Royal Scientist. No! He needed t o see what would happen! What the child would do to the rest of the world was an important source of information! "Interesting, wasn't it?" A voice asked from behind the tall skeleton. He quickly turned around to see Chara smiling down at him. "You! You're a murderer!" Gaster summoned a Blaster, trying to get rid of the Demon in front of him. "Don't even try G. We are already dead, there's no point in trying to kill something that has already died," Chara said, the blast going right through her. "Why would you do such a thing? They were all so innocent." Gaster asked, his heart about to shatter from the thought, the memory of watching all his friends and family die in front of his own eyes. Ignoring his question, Chara walked up to the scientist. "I want to make a deal Doctor." "I'll never make a deal with a monster!" He said, backing away from the child, different emotions filling his soul. "Oh, but I think you won't have a choice. You see, I can do this genocide all over again. I can do it until you go crazy, and I will never stop! I'll never get bored, I'll never get tired, I'll just laugh at how easy it will be to kill them again and again." Gaster did not want to see everyone die again, it would be too much, but, he would NEVER make a deal with the devil.
"No! You will not break me! You'll be stopped, maybe not by me, but by them!" Gaster said, pushing the demonic entity away from his position. "Heh, no? You really are an idiot, aren't you? Very well, when this run is done, I expect you to take my offer." With that, the former child disappeared, the screen reappearing in front of Gaster.
Again and again, he had to watch all of the genocide, the death of all the monsters. And after all of it, he still refused to listen to Chara. She kept doing it until he finally broke. "FINE! What? What do you want?" He said, no longer having any emotions on his face. His soul was consumed with HATRED. "So you finally will listen, huh? Good. Now, Doctor, I'll make you a deal. I will stop my killing and the Genocide, but you need to make a sacrifice. I hated Judgment Hall. Sans is tough, isn't he? He is very weak, but at the same time, he is so powerful." Chara said, Gaster just standing in front of her, motionless. "You want his soul," Gaster said, his HATRED for Chara growing even stronger by the second. "Wow, you know me so well, don't you G? Yes. I do want his soul. With it, I could break the wall between our world and the real one. We can escape. We can be free. Don't you want that?" Gaster did want that. He wanted to get out of this void. He hated it, how dark it was, how empty, It was pure misery. "How do you expect me to get a living being into the Void?" He asked, knowing that it would be impossible. "Well, you were a scientist, weren't you? You can think of a way." With that, Chara disappeared, going somewhere into the Void.
After all the thoughts and possibilities, he had finally figured out a way to get his son into the world of the Void. While doing his work, he watched the human that Chara controlled befriend every monster in the Underground, even freeing them somehow. When the monsters were on the surface, he saw his son's HP rise one. It was an exciting moment for the scientist, but it was too bad that he was betting on Sans soul, just to be free. But he was also doing it to save them from more Genocide. Out of the corner of his eye, Gaster saw Chara watching him work. "I have come to a conclusion, child." He said, startling the child out of her thoughts. "What, did you find a way to get Sans, soul?" "Yes, but you do not need my son's entire soul. If you just absorb half of his soul, you can become strong enough to break this wall between us and the other world." He continued, watching Chara jump in excitement. "Then we can start right away!" Chara said, a demonic smile crawling on her face. "Not exactly, we need to wait. We have to wait till he is in the dream world. Then, with my Void magic, I can pull him from his dream, and then pull him into here." The scientist told Chara, whose smile was slowly fading. "So, we just have to wait till he sleeps? That won't take long." "No child, we have to wait, he just barely got to the Surface, and we can't do it when he is having nightmares. We have to wait till he has an actual dream, not a flashback or a nightmare." Chara nodded her head in silence. She didn't want to wait, but if it's her only option, then she'll take it. "So it's a deal? You never told me if you were in on it." Chara asked to break the silence. "Yes, but after we are free, I do not want to see you near me or my family ever again. If I do, you will regret it." After that, Chara held out her hand to close the deal. The scientist shook it, right after Chara disappeared into the depths of the Void, her laughs echoing through the abyss. Gaster wanted to get out of there. And if he had to make a deal with a demon, so be it.
A/N: So the last chapter was kind of a filler for time, but do not worry, this one will make up for it! Um, hopefully, at least... Welp, see ya later!