You're Nightmare's daughter/son. You have brothers,Killer,Horror,Dust and Error. Cross 17, Killer 14,Horror 15, Dust 16, Error's 10, and you're 12.Nightmare adopted you when you were around 2 y.o and your brothers were 3 y.o. From that moment y'all became 'family',and you're the only human in this 'family'.

You and your brothers have one room on everyone,Nightmare is in another room.

Killer is playing with knife.