New Possibilities(Underfell Sans X Female Reader)

Chapter 20:Caged

Sans' P.O.V.

I carry Y/N inside and follow G Sans towards wherever the hell I can put Y/N.We soon walk into a dim white room with a surgical table and monitors in place.

G Sans:"You can place her there for now."He points to the table and i sigh and lay her down gently.

I feel her grab my hand and I look over to her and see her with sad eyes.I hold her hand tightly and smile sadly.

"It's okay baby doll,G Sans is gonna do a check up on you so don't you worry."

She nods silently and she lets go of my hand while I let go of hers.

G Sans comes over and puts his hand over Y/N's chest.I quickly grab his wrist and he looks at me sternly.I growl as my left eye glows brightly.

"Watch yourself G,Hurt her and I'll hurt you 10 times worse."He rolls his eyes.

G Sans:"Are you done?"I let go of his wrist and he looks back at Y/N.He pulls out her soul and holds it gently.His eyesockets widened."What is this?"

"Why do you think we came to you moron."

He sighs and and looks at it closely.

G Sans:"Well,I'm going to have to run a few tests before I can actually find out what it is.I need to also see what it's doing to her soul."

"And how long will that take?"

G Sans:"Fell,This could be WEEKS of research that I have to do."He sighs."But if you need me to do it in less time then...I guess a week?"

"We don't have a week G."I growl again and sigh.

Gaster:"What if we speed up the process by analyzing her with our magic?"We all look at Gaster."From the information I've gathered,It seems like this black goo is from an individual known as Nightmare Sans."We all stay silent until G Sans chimes in.

G Sans:"Nightmare Sans is nothing but a Myth Gaster,and using magic can make the soul unstable as she is human."

Gaster:"Maybe so,But look at the state her soul is in now."G Sans looks at her soul and sighs."We don't have a lot of time."

G Sans:"Tell me everything you know then."

"That shit on her soul,It's from Nightmare."

Ink:"Nightmare exists,He's dangerous and he gave Y/N that black goo that's on her soul."We all stay silent and look at ink."Long ago,Y/N was created for the first time.When she was created,She murdered a lot of monsters and killed frisk in cold blood.That Y/N is sadistic and unbearably unstable.Seems like Nightmare is trying to revive that old Y/N."

G Sans:"Who is Y/N?"

"My wife."He looks at me and i point to Y/N on the table and he sighs.

G Sans:"To how you eloped with a human is confusing yet bold."He shrugs and looks at Y/N."If what you say is true then we need to take precautions."

"Like?"

G Sans:"We have to get her in a secluded area,Like a room.Just in case this 'Bad Y/N' comes out."

Gaster goes over to the monitors and starts typing something.Then a small beam scans Y/N.

"The bad Y/N came out before...you know.She took over Y/N's body without hesitation."

G Sans:"What triggered it?"He goes over to Y/N and look at her.

I shrug."I don't know,Mafia Fell was being extra dickish so I guess that could've caused it."