Kiana is the daughter between "The Elite of the Kaslana family" - Siegfried Kaslana - and "The Chosen One" - Cecilia Schariac - born in a castle deep in the dense conifer forests of northern Europe on a snowy winter day. Her given name infers to a "grace from god" which ironically confers to later developments within the story itself.
Shortly after Kiana's birth, they were dispatched to fight the Second Herrscherr (Sirin) in Siberia. While this is a long and complicated story, the basic gist is this — Cecilia Shariac, locked in battle with Sirin, ordered an airstrike on her position, sacrificing herself to kill Sirin. Depressed and shattered by his wife's death, Siegfried lost belief in Schicksal.
At this point, Otto Apocalypse was already making plans to use Kiana's body. He created clones of her, one of which was K-423. In K-423, he implanted the Core of Void containing Sirin's soul, giving K-423 life. K-423 was the only succesful clone of Project Sirin. During the raid initiated by Siegfried Kaslana which he only retrieved K-423, the original Kiana however, became lost and was later recaptured before becoming Durandal.
K-423 is in fact Sirin, given a second chance at life, with her soul/consciouness spliting between the side of Sirin that wanted a happy life as Cecilia's daughter (Playable/Normal Kiana) and the side of Sirin that wanted revenge on the world (Void Kiana).
During the course of Honkai Impact 3 players will be playing as K-423 Kiana.
Kiana currently has eight Valkyrja forms available in-game:
White Comet - Her default form, and outfit.
Valkyrie Ranger - Highly mobile ranged specialist.
Divine Prayer - Currently the sole healer in the game.
Knight Moonbeam - Kiana wears an empowered suit bursting through to the limits of Honkai power control.
Herrscher of the Void - Kiana's Herrscher form, originally as her Void persona and later in control of herself.
Void Drifter - Augment Core version of Valkyrie Ranger. Kiana regained partial control back over her body while still being able to access the powers of the Herrscher - Sirin.
Herrscher of Flamescion - After defeating her dark side for good and borrowing power from Bronya, Fu Hua and Himeko, Kiana unlocks a new Herrscher form that uses a greatsword and all their powers.
Herrscher of Finality
In Benghuai Xueyuan, there are three versions of Kiana (one for each of its Eras): Era Zero (1st), Retrospective (2nd), and Reborn (3rd/Final).
In her Retrospective and Reborn versions, she's the 69th successor/head of the Kaslana family.
After Era Zero Kiana dies, her body is turned into Alaya by Mei.
In Retrospective, Kiana becomes the Herrscher of the End after merging with Sirin, and dies after killing everyone on Earth.
In FlyMe2theMoon, she's a young witch from the Moon Kingdom's noble Kaslana wizard family, using a jetpack to search for the lost Eclipse magic in special ruins.
The following tags implicate this tag: kiana_kaslana_(divine_prayer), kiana_kaslana_(herrscher_of_finality), kiana_kaslana_(herrscher_of_flamescion), kiana_kaslana_(herrscher_of_the_void), kiana_kaslana_(knight_moonbeam), kiana_kaslana_(valkyrie_ranger), kiana_kaslana_(void_drifter), and kiana_kaslana_(white_comet) (learn more).