While inside KOS-MOS's memory, the group are guided through a dream-like realm constructed from their repressed bad memories, all the way observed by Nephilim, with whom chaos is acquainted. Shion also meets a vision of Febronia, a Realian woman killed in the Miltian Conflict, who asks Shion to "free" her sisters Cecily and Cathe for the sake of both humans and Realians. Before fulfilling their mission, Nephilim tells them that KOS-MOS was designed to stop the energies of U-DO from entering their reality, an event which caused the original planet Miltia to vanish into a space-time void and could potentially destroy the universe. Due to surviving a Gnosis encounter and remaining human, Shion has the capacity to change the future for the better. During these events, Albedo captures and psychologically tortures MOMO before triggering the "Song of Nephilim", a song which attracts swarms of Gnosis.