Prototype 3 is the third volume of the Vivy: Fluorite Eye's Song Light Novel series.
Synopsis[]
Vivy and Matsumoto, a new stage of their 100-year journey begins. The "Zodiac Signs Festival" is a song festival where old and new diva-type AI meet together. Vivy, who participates in the event, which is also the next singularity point, meets Ophelia, an AI who is said to have committed "suicide" in the official history.
Vivy and Matsumoto intervene in the events surrounding Ophelia in order to stop the "soulless" controversy caused by the consequences of "Ophelia's suicide." However, while searching for the truth, a reunion with a "human" who should not be here comes to pass.
――Does it prove the existence of the "soul" of AI, or is it the work of throwing out one's own life?