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Coils are devices used for many reasons such as information, phone, or e-mail.[1] Each character is seen wearing one.


Coils come in many different forms, but the most noticeable feature is the fact that coils are worn on the wrist.[1] The coil opens a monitor that displays information. It behaves as a computer and a phone.


  • Coils may be relatively new technology due to the fact that Tae dislikes using hers and typically does not wear it - similar to the behavior of adults today encountering new technology



  1. 1.0 1.1 DRAMAtical Murder (Common Route)