"Truth"

Aiko confronts Kanzaki about what will happen to the other Aiko when they reach Primary Point, but they are interrupted by another Matter attack. The team presses on, within sight of K5 and Primary Point, the Kiryu Biotech Research Facility Two. They are attacked by a large humanoid form of Matter which captures Aiko, Kanzaki and Maho. Aiko sees visions of the Burst, but then the Matter releases them safely and they enter the facility. Isazu manages to patch in a video feed from Kiryu Hospital to Primary Point and confronts Kanzaki whom he addresses as Toshihe Yura. Haruka confirms that Kanzaki is Unit One and Isazu reveals that, to end the Burst, the duplicate Aiko must be destroyed. Also that the original Aiko Tachibana caused the Burst during the operation to create the duplicate Aiko (A.I.C.O.). Main character Aiko is the artificial brain in the original body, the duplicate, and Kanzaki intends to induce programmed cell death in her brain before returning it to the artificial body in order to kill it and thus end the Burst. The duplicate Aiko runs away in confusion, but is enveloped by the Matter where she meets the original Aiko.