Naoto Tamura (Jiban)
Name: Naoto Tamura
Designation: Jiban / Perfect Jiban
A human revived as a cyborg by Doctor Igarashi to fight Biolon. He is capable of reverting to his human identity at will. He holds the rank of police commissioner (as a robot) and detective (as human). Jiban's programming enables him to follow these directives:
  1. Arrest criminals in any circumstance without a warrant.
  2. Punish criminals on his own judgment if they happen to be members of Biolon.
  3. Use lethal force depending on the circumstances.
In human form Naoto often plays the fool and is looked on down by Youko and Kiyoshiro for this, but Youko begins to warm up to him after realizing he could be Jiban.