(Sans POV)

He blinked at her, finally realizing how bad the damage was as he looked into her eyes. Her fear for him was clear in her emerald eyes, a sight he had hoped he would never see. Even against Undyne and Asgore she had never seemed afraid, her face always showing a serene and gentle smile that begged for friendship rather than violence. His next thought was about her words about Chara, surprised the little shit could care to be honest. But he did know that Chara understood souls, having spent so much time with monsters before his death. For Chara to be worried about her reaction to his soul, or even worried about his soul at all, said something.

He rolled onto his back, groaning softly as he let the arm she wasn't laying on cover his face. He knew what he what he was about to tell them was going to upset Frisk, since he knew how she hated when he hid things from people. "I…. Dad already knows…. I…. I lied to him. I told him it was the stress of the past couple days."

"Sans! Why would you lie when he could help you?" Her body sat up to look down at him as she yelled at him, her arms crossing over her chest. Despite knowing he was in deep shit with her he grinned, unable to help himself as he thought about how adorable she looked when mad at him.

"Ya know, you are pretty cute when you are mad at me."

"Sans..."

"Fiiiiine. I'm getting up. Let me go wash up. Go ahead and get some real clothes on while I'm in there." He gave in, knowing that she wasn't going to drop this. He slid off the bed and trudged to the bathroom, pausing to glance back at her as she climbed off the bed as well. Her eyes weren't on him as she went to her bag, giving him a chance to just observe her. While he knew he was just procrastinating so he wouldn't have to face his father after lying, he also was just taking a moment to see her like this. Knowing this memory wouldn't stay was depressing, liking the thought of them both leaving a bed they had slept together in. Sighing he grabbed his bag and went in the bathroom, pausing to stare in the mirror as the door shut behind him. He looked like hell, which he had expected after the nightmare. He had gotten enough sleep, he was sure of it, but the dreams always made him look tired afterwards. It was as if he was there again every time, unable to save her over and over again.

Pushing thoughts of the dreams from his mind he pulled a rag from his bag, soaping it up and washing his face. He knew he should probably grab a shower, to wake him more and wash away the guilt for a few moments, but also knew if he took too long she would come looking for him. Splashing his face with water he could hear her singing softly, the song being interrupted a couple times by her saying something. He grimaced as he realized she was probably talking to Chara, having a feeling that once this was said and done he would have to apologize to the little asshole. Despite the fact that they had a mutual dislike of one another the guy was willing to find a way to help, he hoped. He didn't know if he could trust the lost prince, not after the way Frisk had shouted in her sleep. Even though two days had passed since it happened he still couldn't get the fear in her voice out of his head. He let out a self-loathing laugh as he realized the sound of that fear now had a look to match in his mind, the look in her eyes flashing through his mind.

"Yep … it's gonna be one of those days." He muttered to himself as he grabbed his towel from his bag and dried his face. Tossing the towel on the sink he knocked on the door, warning her he was done. "Frisk you decent?"

"Yep! Just pulling my shoes on while telling Chara to stop making fun of my socks." She called back, making him curious as he walked through the door. Frisk looked up from her spot on the bed, a look of frustration on her face. He glanced at her feet and snorted as he saw Mew Mew Kissy Cutie socks on her feet.

"Don't laugh. Alphys got me these." She said, huffing at him as he tried his hardest not to laugh at the pink pictures of Mew Mew on her feet.

"Sorry Frisk… You gotta admit those are pretty cute on you." He managed to get out, his laughter breaking up his words. He barely managed to dodge the pillow she threw at him, his laughter growing as he caught the soft projectile from the air. "Ok ok. I surrender."

His words, and laughter probably, broke her faux anger as she broke down into laughter herself, her head shaking as she pulled her boots on and quickly tied them. "Both of you are assholes sometimes. Come on, lets go to the river person and catch a ride to Waterfall."

"I could just teleport us." He reminded her as she hopped off the bed, pausing as she stopped moving with wide eyes. "What?"

"Chara says you shouldn't even be able to teleport with the amount of damage your soul has. I don't want you teleporting until I hear from Gaster that it's safe." She said softly, making him groan and wanting to shake Chara. While technically he should be weakened so much he couldn't teleport he some how never had to worry about that. Who knows what caused the hidden pool of magic he always seemed to have, though he always assumed it was because of his laziness. Can't use too much magic if you don't really do anything after all. He stared into her eyes, seeing how determined she was not to allow him to teleport before sighing and lowering his head.

"Fine. I won't teleport unless Dad says it is safe, in front of you, for me to do so."

He glanced up to see a smile cross her lips, the happiness in it bringing an answering smile to his lips. He knew he was wrapped around her little finger now, watching her as she walked up to him and took his hand. Following close behind her he chuckled at himself, wondering how she managed to get him to agree to almost anything.

It felt like it took little time for them to stand in front of the grey door, his hands going into his pockets as Frisk opened the door. He held it open for her to go first then followed behind her, mentally preparing for his dad to get angry at him.

"Hello Dr. Gaster."

"Ah, Frisk. It has been a couple days. How are you?"

Sans sighed, moving directly behind Frisk, his head lowered as he translated what dad said. He knew his father would be curious as to why he wasn't being as silly as the first time, and he also knew it would only be a few moments before he was in trouble with a third person.

"Dr. Gaster…. Sans' soul is so damaged. He admitted that you knew but that he lied about why it was. He has been dreaming about the times I died when trying to get through the Underground. This morning he dreamt of when Asgore killed me, three times." Frisk took no time in breaking down everything, leaving him to wince as she spoke about the dream he was still trying to avoid thinking about. He felt his dad's eyes on him, staying quiet as his father pulled his soul where it could be seen. "It's not just that. When I reset his soul has always just been dull, not damaged. Which means my deaths have worsened what damage he already had. Chara believes you can find a way to separate us and still allow him to assist me so I won't die again."

"Chara does?" His father questioned, his head tilting to the side. Sans let out a short laugh, turning the other two towards him.

"Sorry…... Your reaction was just as disbelieving as mine."

As he said this a shiver ran through his spine, one he knew his father felt as well as they both turned to look at Frisk. Her head was lowered and her breathing labored before her head rose again. Instead of the green eyes he was so used to red eyes stared into his, setting off his anger. He could feel his magic flare, knew his eye was glowing. He almost spoke when his father lifted a hand, stopping him before he could do anything.

"Chara. Why have you taken control?"

"Dad wants to know why you took over Frisk. Answer fast asshole." He growled out, his magic flowing around him in a way that had his clothes shifting as if a wind passed. Chara sighed, placing a hand over Frisk's heart as if to check something.

"Don't worry Frisk. I made a promise, didn't I? As for you two questioning my motives, just know I do this for her. Not you, Sans. You make her happy and knowing she caused you pain by doing the right thing upsets her. So if there is a way to help I would be appreciative if it is found. I don't like you any more than you like me, you trash comedian. Despite him deserving it, you hurt Azzy. I can never forgive that. I, however, will not lay a finger on you. You have protected Frisk, the only person who I could not make do what I wanted. She has helped me, without even trying, to understand my actions. By protecting her, no matter the cost to yourself, you made yourself someone I will not harm. But…." The voice coming from Frisk paused as a wicked, sinister smile crossed her face, telling him where this was going before the guy even finished. "If you hurt her when we are all free…... I will kill you. Slowly."

With those final words Frisk's body slumped, Sans moving forward to catch her. His magic flowed away from him so he couldn't hurt her as he carefully lowered to the floor, holding her against his chest. "Frisk? Come on Frisk, answer me sweetheart."

"S-sans…. Ooooh my head. Damn it Chara. Give me warning next time." Her voice came out weakly, her eyes opening to look into his before she gave him a small smile. "Sorry…. He got so mad he was being questioned again that he just took over. He knows he is in trouble with me now, I think. He's not feeling mad anymore, at any rate."

"Kid, you almost scared the life out of me. Especially that fall when he left." Sans told her, his hand rising to cup her cheek. He wasn't sure he could handle watching Chara take over her body like that again, the feeling that came off of her as he took over and the way she fell right after had him shaky. He felt his father's hand clasp his shoulder, bringing his attention up to him.

"Allow me to examine her soul before I check on you, son. I want to make sure she is ok after such an event." His father said softly, leaving him to only nod before turning to Frisk with a gentle smile.

"Dad wants to check your soul real quick before he focuses on mine. He says he wants to make sure you are ok after all that."

"Ok. Even Chara is on board, seeing as his is connected to mine. He says he wants to know if he accidentally did anything that may have changed it. I think he regrets not thinking of that first." She answered, sitting up with his help. Sans clenched his teeth, choosing not to say what he thought about that kind of recklessness.