Finnel's Cosmosphere, Level 9
(Missable)
Granted, this is missable and unobtainable should you have accepted Tyria's or Saki's affection/confessions, as you won't be able to even progress through 8 otherwise. Finnel and Suzunomiya come together to create a world free of the Supervisor's influence, something that has been made by all of the personae that dwell within Finnel (including some bits from Aoto, whom she shares her heart with).