Possession (Gaster x Sans Fanfic)

You make me happy

Wakkkkkeeeeee uuuuuuppppppp Duuuuunnnnkkkkllllllleeeeee! Coooooommmmmeee ooooonnn!

"alright, alright kid. i'm up. did pap rope you into doing this?"

Maaaybe.

"i'll take that as a yes. can you please remind him i need to sleep?"

Sure but first he needs to come downstairs. Come on Dunkle Sans.

"alright, alright, imma coming."

Alright, you'll be downstairs. Hurry up Dunkle Sans. Love you!

"heh heh, love you to kid. cya in a sec."

You go to head downstairs but swear you see the shadows move. You hesitate as you see a sinister grin form from them.

"kid? you okay?"

Yeah, yeah you're okay. Just seeing things. You'll go now.

"kid wai-"

You don't let Sans finish and head straight to the bathroom. It was a given with you living here and with living on the Surface. You turn the light on and go to the mirror. An all too familiar face is there with their green and yellow stripped sweater, staring at you.

It's yo-me. Chara.

No, no. It isn't.

It's you.

Yeah, that's better. They're gone. Just a figment of your imagination.

Or am I.

Chara isn't here. They can be. They gave you your happy ending and left.

I couldn't last in this world without you gaining LV so I decided to give you your 'happy ending' and see the possibilities. Wait for the pain and disappointment so you'd come crawling back. This time, I would make you happy. We could gain LV from the humans after all.

NO! You won't kill. Not again.

You act so high and mighty. You were the one who killed them all. Not me.

Yeah but... you wanted to stop. You know there are consequences for your actions but you don't want to make others pay for your mistakes. You wanted to stop after Papyrus. You thought this world was kill or be killed. You thought he'd use your mercy to kill you. You attacked first and he took it and never fought back and still believed in you and you owe him. Those words allowed you to believe in yourself when the Judgement Hall allowed you to feel the weight of all your sins crawling on your back. Those words gave you the determination to stop. To stop Chara. You had given up.

Hahahahaha. How cute! Since when were you the one in control?

Since you stopped gaining LV. Chara is powerless and stuck in non-existence now. They can't touch you.

You would be correct, if I was alone. A monster and human SOUL working together allows them to gain great power, no matter how shattered the SOULs are. I have a friend. You didn't save them and they're desperate so they will obey. They will force you to obey and then, together, partner, we will destroy this world and move onto the next. All my friend asks, is for him and his 'starlight' to be together. That's easy to sort out. Just got to get his 'starlight' into our place of non-existence.

You tell Chara they won't succeed.

Oh, sweet, naive Frisk. I already have. Make the most of the days you have left. They are numbered.

A shiver runs down you spine. Chara? Chara! CHARA! They're gone. You wash your face again, turn the light off and leave the bathroom. You go downstairs and see your family ready to go. Sans waves at you, the heart locket around his neck. You smile. It was your idea to do something for Sans in celebration. If he's happy, you're happy. He already loved someone, what a shame, but you love him. You have never felt this way about anyone before and it's not like you got much competition. His previous 'lover' abandoned him after all. He doesn't know your true feelings just yet. Maybe you will admit them today. Probably not. It doesn't matter. Being best friends is good enough for now.

Because despite everything, he makes you happy.

Because despite everything, he makes you happy. That's why that child can't have him. Oh well, when Chara gets their hands on them, they'll suffer and he will be yours. No one can have him. He is all you care about. You don't care about anything else. He is all that matters.