Fun fact: A challenge Sayori and Sephiroth might face is the process of humans starting space colonies since they continue living through the technology age, since there’s only two of them vs billions of humans utilizing advanced technology and dominating planets, stars, galaxies, etc. The issue is that Sayori and Sephiroth believe that if humans took over other celestial bodies then the universe would end up becoming corrupted by the influence of the human species [they also believe that logic of humans doesn’t make sense, which is part of the reason they stripped their shirts]. In the [totally not burning] eyes of Sayori and Sephiroth we are the monsters who just want to corrupt the universe and would need to be terminated as soon as possible