The chief antagonist in episode four. Daughter of the "modern von Neumann" Katsuyuki Kamiyama, her consciousness was removed from her body by Katsuyuki and uploaded onto the net (2.0) as an artificial intelligence, effectively killing her in real life (1.0). Katsuyuki implies that this event was the cause of Great Network Crisis of 2020. Ruon spent five years posing as an online sex doll until she became infatuated with Teruki because he was the first person who wanted to meet her offline. Following the events of the episode, her physical (android) form is destroyed inside an airplane jet engine. From Wikipedia.