Congratulations! You've been in the Bad Sanses for a couple years now, after their recent full team mission was in your Au. They killed everyone of course, who won't after what the hell Nightmare found? They were experimenting on kids. You were the oldest one and the most dangerous, seeming as such if they locked you in deep and put you in cryostatus. Of course Nightmare was furious, and recused you and leveled the facility to ground zero.

Extra, you've been there since you were three, because they tricked your parents into signing a thing a consent form. Because it was to find a cure for your cancer (I'll let you choice what type, but it's the highest phase without any chance of surgery.) good news, you're cured! Bad news they made you a tool of mass destruction. That Nightmare refuses to use. Yay!

Don't worry Error is there... He's not in the picture, my excuse Nightmare brought the others there because Dadmare needs a goddamn break. :3

It took me way too long for this shit, I'm tired and I don't know how to fix it if the characters act out of well character. Good luck.

Edit 1: Nightmare should be more Nightmare now.