Ep. 16: GunBuild-2 Activation Test and Mizuka's Tragic Exoskeleton Malfunction
Aired on February 8, 2013

The Robotics Club tests GunBuild-2, but loses their JAXA hangar due to upcoming rocket launches. While Kaito searches for a report, Junna detects a walk cycle error in the robot, which nearly falls on Subaru. Meanwhile, the Exoskeleton president discusses disposing of Kaito with Misaki. At Cape Kadokura, Kaito finds the seventh report but is stopped by Mizuka, who warns him about Kō Kimijima. A call via Poke-Com triggers static that malfunctions Mizuka's exoskeletal legs, forcing her to walk toward a cliff edge. Despite Kaito's desperate attempts to restrain her, the legs damage her body. Mizuka pushes Kaito away, thanks Misaki, and falls to her death, leaving Kaito horrified.
Episodes
- Ep. 12 · Kaito gathers flags while Junna faces robot trauma and Doc repairs his past mistakes.
- Ep. 13 · Kona reveals Gunvarrel secrets while Kaito uncovers Project Atum and a solar storm strikes.
- Ep. 14 · Kaito battles a Kill-Ballad opponent to unlock the server and stop the robot uprising in Tokyo.
- Ep. 15 · Airi's Digital Existence and Kaito's Discovery of Her True Origin
- Ep. 16 · GunBuild-2 Activation Test and Mizuka's Tragic Exoskeleton Malfunction
- Ep. 17 · The Robot Research Club is Hereby Disbanded!
- Ep. 18 · Kaito and Akiho attend the Tokyo Expo while Misaki promotes the Exoskeleton robots.
- Ep. 19 · Kaito and Akiho confront Misaki's sabotage while uncovering Kimijima's global conspiracy and immortality plot.
- Ep. 20 · Mitsuhiko streams Kimijima's confession regarding Misaki's past and Project Atum while the team prepares GunBuild-1.