Coils are devices used for many reasons such as information, phone, or e-mail. 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. 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