Ep. 21: Altair absorbs Sirius to threaten the world while Setsuna is summoned to confront her.
Aired on September 9, 2017

21
Altair integrates Sirius into her being and defeats the other Creations, pushing the world toward The Great Destruction. To prevent this catastrophe, Meteora and her allies attempt to bring Setsuna Shimazaki, Altair’s Creator and their final hope, into the world. Once there, Altair and Setsuna meet as Creations within the same reality. Their encounter leads them to uncover and reveal their genuine emotions toward one another as they face the impending doom.
Episodes
- Ep. 17 · The Rain's Rhythm Shoots Down on the World's Roof
- Ep. 18 · Magane confronts Souta while allies defect to Selesia against Altair's final scheme
- Ep. 19 · Selesia Reunites with Charon, Who Joins Altair After Tiring of Endless Conflict
- Ep. 20 · Meteora attempts to trap Altair in the Bird Cage using Sirius as a secret weapon
- Ep. 21 · Altair absorbs Sirius to threaten the world while Setsuna is summoned to confront her.
- Ep. 22 · Creations depart after the Elimination Chamber Festival concludes successfully