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The best part was that this "chat room" between the four of them was completely exclusive. Not only was it on a frequency the Sapientia had no way of accessing unless they somehow had one of their souls transplanted into them, even if the necklaces and chains were stolen, it would be impossible for anyone to use them for the same reason the Sapientia couldn't "wire tap" their talks: unless you had one of their four souls as your own, you couldn't use this communication device.

Even further, because of these truths, even if they were stolen, it wasn't possible to use it to track one of them. Only one of Clara, Ri, Madeleine, or Dyon, could use these necklaces to find one another from whatever the distance.