Cygnus was first mentioned one of the cutscenes of Heartstrings. Pilate told Spectra and Luna that they will need Cygnus to defeat the player in their dream. Cygnus first appeared in Stardust. Cygnus told the player that there is only one way to escape and that method would be via death, either it be the player or Cygnus themself. After Cygnus' defeat in the level, Magpie communed with the player through the dream that Cygnus is dead, and that the player is now able to wake up.