Personality... self-centered, ruthless, anti-social, and arrogant. The DELUSIONAL Sephiroth becomes obsessed with power, thinking himself “the chosen one” of the planet. In order to achieve his evil ends, he's willing to sacrifice and kill anyone in his path.Sephiroth is notorious as one of the most sinister villains in Final Fantasy. He is powerful beyond belief. He is the main antagonist in Final Fantasy VII, but he is not evil simply just to be evil. He is more than just rage and destruction.