Arc 19Kiana’s Last Lesson
Otto’s schemes awakened Sirin and led to the destruction of Sky Vault City, while Himeko sacrificed herself to free Kiana from Sirin’s control. Kiana began using the Herrscher’s power to protect others, but after saving the city, she was left exhausted and hunted by Schicksal and World Serpent.
- The Light Screen revealed that Otto had manipulated K423’s life and arranged the deaths of her companions to awaken Sirin, while also showing Wendy’s death after Bronya was controlled by Cocolia.
- Otto trapped Kiana in a virtual world with a data afterimage of Cecilia, then provoked Sirin’s awakening and unleashed a global Honkai eruption.
- Theresa and Anti-Entropy rebelled against Schicksal, but Otto let their forces face the Kong Herrscher and killed Fu Hua when she challenged his plan to save Kallen.
- Fu Hua’s consciousness guided Himeko to the Godsbane Armor, and Himeko sacrificed her life force to break through the Kong Herrscher’s defenses and free Kiana from Sirin’s control.
- Kiana blamed herself for Himeko’s death, but Fu Hua urged her to live on, and Kiana later rescued Rita from a World Serpent facility and gave her evidence of its experiments.
- Kiana refused to leave Sky Vault City with Mei and Bronya, then used the Kong Herrscher’s power to defeat Collapse beasts, protect civilians, and push the fission reactor into subspace.
- Kiana detonated the reactor safely, but after her powers were spent, Schicksal and World Serpent hunted her across a snowfield as the observers watched in alarm.