After few hours, UltSans was placing Aliza in a crib, que she remained sleeping peacefully. UltSans sighed, and then started to check and organize a little more the bedroom he created for Aliza.
After a moment, he teleported out to the stairs, checking if the baby gates in both sides of the stairs, upstairs and downstairs, were working perfectly and were safe.
UltSans (Whispering): "Sigh Well... Her room has everything I think a little kid like her could need, and this... little doors...? Whatever, work perfectly. I guess nothing more, right?"
Then, Zarethra, the red sihlouette, slowly faded in behind him, and surprised him by hugging him from behind.
Zarethra: "Why? Is not your daugther or anything. Do you really want to start having one? At least you could've told me you wanted to be a parent for... you know~..."
UltSans hesitated, and stopped himself from grabbing her hands, to just pat them as hesitates.
UltSans: "I... I don't know... I guess I panicked? Maybe I couldn't with myself and I just did that?... I never know why I do anything, but... Maybe I simply couldn't let that Aliza like that?"
After a short moment of silence, Zarethra moved around him, and her hands on his torso moved to his cheeks holding his face.
Zarethra: "Well, if that's what you want... I wonder for how long will last before... you get bored again. Or before she leaves you somehow... You know very well, as you're very used of girls dissappearing without warning."
UltSans: "Yeah... No need to remind me of the humans, but... Is a little kid. Is not as... can go anywhere, or survive on her own. So she isn't going to disappear, right?... R-right?... You won't... take her away... will you...?"
Zarethra: "Look at you, Asriel. No matter the name you put both of us, the names you use as Zeriel or UltSans, or calling yourself Sans in your head... All are tags to change somehow the same thing, you."
Then, Zarethra moved closer almost up of him with an intimate closeness.
Zarethra: "While your new 'daughter' sleeps, why don't you go train? I want to see how hard you can be, so... Let me see~"
UltSans: "U-uhm... O-okay..."
Then, UltSans started walking to the gym. Once there, UltSans trained what Zarethra told him to train, and after a big while, Zarethra threw him a towel he grabbed with his right hand and used to dry his face, to then do a quick move and roll it and put around the back of his neck while he holds each extreme with each hand.
UltSans: "... I still wonder why I don't improve... No matter how much I do, I don't..."
Zarethra: "Well, you don't have infinite potential. But you show you do, which of course, goes with another game rules~ But let's let that for other time."
UltSans hesitated, and then softly hummed while looked down.
UltSans: "Maybe... I can find in somewhere the answer... Maybe I can... find... something, someone, or... anything... that could possibly tell me..."
Zarethra: "Alright. I'm curious what will you do."
After a moment, UltSans with his outfit again, walked and sat on the chair of the lab, and started using the computer, searching with the help of Zivo.
After quite a big while, no results, but suddenly, UltSans heard Aliza crying, so he stopped in a sudden, and teleported to her bedroom. In there, he checked Aliza, and she was crying, but when she saw him, she stopped, and moved her arms up wanting him to pick her up.
UltSans hesitated, but then grabbed her by the armpits, and gave her little jumps while she was sitting over his left arm and hand.
UltSans: "Shhh, shhh... I'm here, I'm here..."
After a moment, he was sitting down, with his legs crossed and she sitting on his lap.
Then, all flashed and all changed. A parallel, UltSans as Sans and Aliza as Papyrus when was younger, the same pose where Sans was taking care of Papyrus.
Then, all flashed again, and UltSans was back, but his expression was confused and stunned.
UltSans (Thought): "H-hu-w-wha... Uhh... Why... did I see Aliza as... And my hands as skeleton hands...? Sigh I guess all of this is more of a... memory muscle? Or a soul memory? Or... a soul memory muscle?"
UltSans hesitated, but then sighed, and decided to simply continue researching, and so, he teleported to his lab, sat on the chair while having Aliza sitting on his lab, and continued researching.
After a while researching, Zivo started telling him to not look where he was looking, what made UltSans curious of why. Aliza didn't understand anything, but remained looking the monitors and getting hypnotized by how fast the things on the screens were.
After a moment, UltSans easily got rid of Zivo to stop bothering, and started looking around where was searching, but there was nothing, so he kept searching as there had to be something.
After a while of searching and encoding, he finally found something relevant, a carpet named dead AUs. Inside were a list of dead AUs, but no explanation of what it exactly meant.
UltSans (Thought): "Yeah, sure... 'Dead AUs'... If they were dead, they wouldn't exist, no?... Would they?... Dead AUs would not be considered as AUs because... are dead basically... So... by discard... and maybe logic...?, it has to be something else...?"
After looking, he searched in HorrorShift, as the name was strange to him. But then he started to check all about the AU, and got traumatized, speechless and shock.
He repeated constantly the battle of HorrorShift Toriel and HorrorShift Chara, watching it over and over, until a while later when he teleported and placed Aliza in the couch, leaving her with her SoulTablet to watch educative content and the different animals in the fauna.
Then, he started working on his lab on an eye for HorrorShift Chara, but without knowing how to an eye or the proportions of how it has to be. But he didn't care, as he did either way, while also always having an eye on Aliza, but luckily, for quite few hours, Aliza didn't need him, what allowed him to focus entirely on creating the eye.
After near 4 hours, Aliza dropped the tablet on the couch, got down with caution, and walked all the way to the lab, and then grabbed UltSans' jacket, surprising him.
UltSans: "Eh? Oh, want something?"
Aliza moved her hands down and then her right hand to point at her mouth while opening it.
UltSans: "Oh, alright. At least you're not all cries."
He said while kneeling down and picking her up, then took her to feed her, but after that, Aliza wanted him to pick her to be with him, and now he had to deal with her while also finish the eye.
So he got an idea, show Aliza what he was doing. Aliza, curious, moved her left hand to touch the eye, but after a short moment, she moved it away to hold UltSans' neck.
UltSans: "Yeah, yeah... Is not soft, or even a toy you could play with. But... Wait a moment."
He then sat Aliza in the chair of the lab, and showed Aliza how he was going to finish the eye. After a while of finishing, and making Aliza not get near for her own protection; he finished the eye, and gave it to Aliza, who checked it around.
UltSans: "I think... Huff... I don't want to do this again... Good I noted it... Wait, I did?... Bruh, I forgot..."
After few seconds, Aliza looked at UltSans, who was tired and observed at her. Both remained hesitant for a short moment, before suddenly, Aliza moved her hands up and threw down the eye.
But UltSans reacted quickly, using his blue magic to make the eye float. He was between extremely nervous and worry, but also trying not to laugh or giggle.
UltSans: "... Ugh, hehehe... Yeah, I'm gonna loose it... Pfft..."
Meanwhile, Aliza laughed. UltSans hesitated, and after few seconds, sighed in desperation, to then fall to giggle.
After a short moment, UltSans took Aliza to her bedroom, and left her with toys to play, before making Zivo open a portal to HorrorShift.
Once there, UltSans walked through Snowdin forest, but peace wouldn't last long. After a moment, in a sudden, UltSans activated a trap that did nothing to him, but alarmed Asriel and Chara.
UltSans hesitated, but after a few seconds, he continued walking but slowly and wondering. But short after, he got ambushed by both, and he got forced to fight.
Chara and Asriel focused on attack to kill, the comments of Chara telling Asriel to showcase what he learnt adn to be the real final test.
UltSans handled both with his blue magic, making both be against the ground. He then walked towards Chara, and kneeled in front of him to grab his face. UltSans' left hand over Chara's right cheek, but then he slowly moved his right hand to quit the the patch of Chara's right eye, and hesitated while Chara's expression was of anger.
After few seconds of stare, UltSans moved his head to make his forehead touch Chara's forehead while he closed his eye.
UltSans (Thought): "I... I'm sorry, Chara. I'm sorry this happened to you... And... yes... I know... what happened, how you feel... I'm like you in a way, but... now isn't the moment to talk and explain."
Then, UltSans moved Chara's head back, and got distracted, making Asriel and Chara be out of the blue magic, but the eye UltSans was showing Chara, amde Chara forget the moment and focus on the eye.
UltSans offered the eye to Chara, but Asriel sneaked and reached to hit the back of UltSans' head with the meat tenderizer. The hit was instant and precise, impacting at the brainstem.
UltSans instantly fell forward, uncapable of moving, uncapable of thinking, his view blurry but letting him see a small portion of the middle while everything else is gray near invisible, and his body in a forced reset.
Chara remained hesitant, staring with his right eye, the eye UltSans showed and offered to him, in his hands. Asriel didn't wait, and grabbed UltSans by the legs, and started to drag him around.
After a moment, Asriel called for Chara, who then woke up from the focus he had on the eye, and then went with Asriel to drag UltSans to their house.
After a short moment, UltSans slowly recovers, as his view quickly in slow progression recovers and he starts to can hear, see, and breath. At first, he remains absolutely calm, as after the forced reset, all his nerves, muscles, and mind, have been reset to zero, what he took as an opportunity to look around calmly and observe the snow and trees.
UltSans (Thought): "... I feel... new... I forgot how it feels to reset this vessel that my body is... I forgot I could reset myself, but... I also lost that ability... but... that felt... actually good..."
After a short moment, when they were about to reach Snowdin, Chara turned to look at Asriel, but then noticed UltSans being awake, so he got surprised, and stopped.
The moment took UltSans out of his thoughts, and then quickly throw down.
HorrorShift Chara: "Hey, human! How are you awake?"
UltSans hesitated, but after a second, he turned to be down-up laying down.
UltSans: "Eh?"
HorrorShift Chara: "Are you deaf, human? Answer!"
Chara demanded while moving slightly closer to UltSans, and his expression firm, straight, and serious.
UltSans: "Oh uh... Well... I never got unconscious, and... I think I just... can't?... I don't know, but... that was... wow..."
Chara hesitated, his expression now of wonder and struggling to understand UltSans.
HorrorShift Chara: "... Explain yourself, now!"
UltSans: "I... don't know how to explain it, but... thanks for the hit. I really needed it."
He said while getting up, and starts to stretch his arms, to then also yawn with a tired expression. Chara hesitated, still trying to understand.
UltSans: "Alright, uhm... I-Oh, yeah! I just remembered. Chara, I... I came here to give you an eye, so... you could have both eyes again."
Chara hesitated, but now got out the eye from his pockets and stared at it, while UltSans was talking.
UltSans: "What I wanted to say, was... Uhh... Oh, uhm... That I know, and... I forgot. But well, I-Oh, you have the eye? Well, then I go with it. I made it myself entirely, and exclusively for you specifically."
Chara then turned to look at UltSans. Meanwhile, Asriel remained half aware and not understanding why the moment, as this wasn't something Chara prepared or trained him for, and so, he remained silent and waiting for whatever Chara wanted him to do.
UltSans: "I came also to help you. I... I saw it all, I saw what happened to you, and everything. And after that, I focused on creating that eye for you. And I know what you may think, but... uhm... What are the correct words...?"
HorrorShift Chara: "Explain it how you can."
UltSans: "... Well, fine... I know the feeling of trusting to be betrayed. I know what... those who were once your family, did to you. And there are limits, which they passed, and so... I also came to offer my help, and... I know what you have in mind, so... Do you... uhh... Yes?"
Chara hesitated, thinking deeply as the revelations, along seeing a human handling a straight hit in an important part of the head, were suspicios and making him uncomfortable, so he turned around and continued to Snowdin town, and Asriel followed Chara.
UltSans hesitated, and then ran a little to follow them.
UltSans: "L-listen, I... For what I saw, I know what you did and for what. And I'll tell you. You want to kill Toriel, so you trained Asriel to know how to be really prepared for real battles, and how will be against Toriel. Let me help you, Chara."
Chara then stopped, and slightly turned his head to his right, eye sighting UltSans.
HorrorShift Chara: "... How do you know? You look very good to could been living in the Underground."
UltSans: "I come from somewhere else, not from this world. But could be better to be explained later. Let's go kill Toriel, solve this world by... the only way I think it cna be truly fixed, and... Let's go to a better life, alright?"
HorrorShift Chara: "... Detail your offer. What you give, what you get."
UltSans: "H-huh? W-well... I... I give you a life, so you would have one again; food, and live out of this weird hell. I get... you. That's it, I get you to be with me. I don't expect you to be nice with me, but I want to help you, genuinely. I can't simply look at you, because looking at you, and see how you ended... I just want to fix you, Chara."
Chara hesitated, his expression firm and questioning UltSans mentally, and then turned his head straight to continue to take UltSans to their house.
HorrorShift Chara: "Let's go bandage your head, and then you will show me what you can do."
UltSans: "Oh, right... I can just heal myself."
Chara hesitated, turning quickly to look at UltSans, who used healing magic, healing the injury of his head.
UltSans: "So... What do you want me to prove? Or do you prefer a more direct demonstration by a fight or going with you to kill Toriel? Whatever you tell me, Chara."
Chara hesitated, not only surprised by UltSans using healing magic, but by also having magic in the first place, apart of other aspects not normal he was showing. But the part UltSans just said, made Chara remember when Asriel was indecisive and nervous, asking him to know what to do.
After a short moment of thinkin, for Chara's view, UltSans was just endlessly better than Asriel, and so, saved the eye on his pockets, and killed Asriel with one quick attack, a slash of one of his knives in the head, and Asriel disted quickly after.
UltSans remained paralized by the surprise, not understanding why Chara just killed Asriel, but Chara then moved and grabbed UltSans by the neck of the jacket, making their faces be close, but Chara's expression was firm and direct.
HorrorShift Chara: "Alright. Let's go kill Toriel, and then show me from where you come from, as the part of not being of this world, may not mean the surface, by the fact you have magic, and can just heal yourself like nothing."
UltSans hesitated, humming softly and nervously, but then, he kissed Chara's forehead. Chara hesitated for a second, and then quickly pushed UltSans away.
HorrorShift Chara: "Don't do that again."
UltSans: "Alright, alright. I guess you're not used to it, I don't blame you."
HorrorShift Chara: "... Shut it already, and let's go."
UltSans nodded, and followed Chara.
UltSans: "Also, I guess you're flat?"
HorrorShift Chara: "What are you talking about? I told you to shut up. Stop talking shit."
UltSans: "I'm just saying because you don't have chest."
HorrorShift Chara: "... Boys don't have the chest of girls, what did you expect, idiot?"
UltSans: "Wait, you're a boy? Oh shit... Well, this is awkward now..."
Luckily, or unluckily, Toriel appeared in Snowdin, and they encountered her as they were walking to go to Waterfall.
Toriel got surprised to see another human, but Chara quickly started to attack and start the fight, Toriel reacted quickly, while UltSans hesitated for a second before using magic.
With extreme easy, Chara killed Toriel as UltSans used blue magic on Toriel. Then, Chara grabbed and absorbed Toriel's soul, while UltSans hesitated.
UltSans: "Well... I guess that's one. You want to... Kill Asgore, or... Simply erase all of this?"
Chara hesitated, but then quickly started walking to Waterfall.
HorrorShift Chara: "I'll kill Asgore, and then we leave this hell pit."
Chara entered Waterfall, leaving UltSans behind for hesitate. After a short moment, UltSans then started running, and followed Chara.
After they reached Hotland, they went straight to the lab, and killed Asgore with no effort. Chara absorbed Asgore's soul, and told UltSans it was time to leave.
UltSans opened a portal, and Chara walked without hesitation and just went through, UltSans hesitated, and then he used a save star and erased the timeline, and went through the portal.
Everyone in the timeline got killed instantly, out of existence without any trace behind.
Back at UltSans' personal void, UltSans hugged and carried Aliza, while Chara simply took a sit on the couch of the living room. UltSans hesitated, but then helped Chara to have his own bedroom.
Chara remained distant, and decorated his bedroom alone, leaving UltSans to take care of Aliza.