Iris's Death

When Repliforce's coup began, Zero rushed to the Space Port to stop the ascension of the military troops to the newly constructed space station of Repliforce, Final Weapon. There, he fought Colonel again, this time killing him. After that, Zero traveled to Final Weapon itself after discovering that Iris was missing from the Maverick Hunter HQ. He eventually encountered Iris, who was blinded by the grief of losing her brother and anger for Zero killing him. She had salvaged Colonel's memory chip from his remains, fusing it with her own programming, thus turning her into the ultimate Reploid she and Colonel were originally planned to be, and Zero was reluctantly forced to battle. Even though Zero didn't mean to cause harm to her, Iris was out of control due to her programming and Colonel's being in conflict, which was also damaging her. While Zero destroyed the structure resembling a Ride Armor around her, the damage to Iris' was irreparable. Zero hurried to Iris's body, but it was too late to save her. And while Iris lay dying in Zero's arms, she whispers to him that she did all this because, even though she knows it is nothing more but a fantasy, she wanted to live in a Reploid-only world together with Zero. After Iris says her final goodbye to her friend, Zero tries to get her to wake up, but fails and has a breakdown, questioning what he is even fighting for.