Diode

Diode is a utility robot originally destined for the great scrap heap in the sky, but was recovered by Ryu Yamada and reassembled at the Dragon Sanctuary to be a household robot. Ryu had found Diode in a scrap pile. It is unknown who Diode's original creator was.

Although he appears to be like any ordinary utility robot, Diode seems to possess a significant array of strange abilities, from emotions to the ability to break locks and take control of other robots. Now he is Tai's wisecracking partner in battle and he is of great usefulness when it comes to tackling the immensely technological world Tai has to face.