Honkai Impact 3rd: Second Eruption, being a prequel comic to the game, features several of HI3's background characters and some more.
- St. Freya Academy: Theresa Apocalypse
- Human organizations:
- Schicksal: Otto Apocalypse, Cecilia Schariac, Cheng Lixue, Patricia Highsmith, Salome Jokanaan, Shub-Niggurath, Shigure Kira, Siegfried Kaslana, Amber
- Anti-Entropy: Walter "Welt" Yang, Einstein, Tesla, Arhat
- Cocolia Orphanage: Cocolia
- World Serpent: Kevin Kaslana
- Honkai Beasts and Herrschers: Assaka, Benares, Sirin, the Seraphim Princes, The Will of Honkai
