You and Syera are Twin sisters and you both are a witch

After a few days you both woke up in a laboratory

The Warden comes into the cellblock to greet/meet the inmates

Warden: Welcome monsters to your new home, you better obey me or else... He looks at me and smirks like he's planning something, He knows that you are 13 years old and that Syera is 14 years old, The Warden knows everything about you