Mind Control Chip

Mind Control Chip is a small technology chip that takes control of a person's mind.

Overview
When activated, the person enters a short trace before being completely taking over and doing what the controller says. It was first used Jean-Michel Roger when he activated his King's Gambit plan on all of the Security to take over the City. Roger later decided to implant this chip into Yūya to place him under his control in preparations for his duel with Crow. However, due to Reiji's interference, Roger was unable to perform Yūya's surgery due to shortage of times and instead placed the chip inside Yūya's helmet. The chip placed in Yūya was different from the ones implanted in the Security and Sergey, instead of directly controlling him, the chip produced electricity that stimulated part of his brain that increases his aggressiveness, forcing Yūya to enter Berserk Mode. This torture consequently also synchronized Yūya with his dimensional counterparts, leading them to feel his pain and also entered the same state.

Those who are under control

 * Security
 * Sergey Volkov
 * Yūya Sakaki