Natasha looked at the device on her wrist and begun modifying it so that only she could alter her own size with the device, rewiring it as desired until in her wrist was a device that could shrink or grow her to any size she desired.  She then sat up on the floor and stood up as the power came back on...she was still naked, but the only thing she grabbed to wear was her lab coat as she walked along to the camera room briefly to check that all was well...seeing that Cecil had been caught and hearing Juliette's conversation with Karia, she left the room and started work on her collar and bracelet idea...the notion that Karia could be controlled if Juliette was in full control over the girl's size.  It would take her only half an hour to piece them together with her intellectual skills and she smiled as she made the collar look like something Karia might want to wear, the design of it appearing like a black leather band with little studs...though the design of the bracelet looked a lot more sophisticated, like an expensive watch...in fact it could even tell the time and act as a tracker for locating the wearer of the collar with functions that allowed communicating with or disabling communications with the shrunken individual as the wearer seen fit.  Natasha knew that Juliette would just love it.