Weeping Angels

If a victim is turned to stone, Aimi can subsequently command these statues to do what she wants of them, by using her chakra to give them partial sentience. They will attack anything within a certain radius of them, and are extremely useful as you can't kill a stone. And though they could be broken, Aimi could choose to expend her own chakra to help them recover themselves. Beyond all this, they can be used for surveillanceoutside of Aimi's range because they only move when no one is looking at them.