Cecilia Schariac was the wife of Siegfried Kaslana and the biological mother of Kiana Kaslana. She was the most powerful valkyrja ever known by Schicksal with an S-Rank.

A Manhua of the popular smartphone game Honkai 3rd launched by miHoYo 
 
「Collapse」 ... An unknown force once known bury the civilization of mankinds in the distant past ... now descended into this peaceful world once again.
 
"Honkai, the mysterious power responsible for destroying human civilization countless times, has descended upon this beautiful world once again…” With the lands now flooded with deadwalkers and Honkai beasts, a group of girls bearing the burdens of despair continue their fight onward. Will there be any hope of clinging to survival?"
 
Three years ago, the third Honkai descended upon Chuangai City in the far east... Under the glow of sunset, Valkyrie Kiana leapt out from the Hyperion, plummeting through the clouds like a falling meteor towards a warship. Her relentless Valkyrie determination represented a glimmer of hope. With this breathtaking scene, the story of the Captain and the Hyperion begins and the stage is set for the battle with the Honkai. Fight for all that is beautiful in this world!

February 2000: Every personnel of Babylon Labs vanished within a single night. Overseer Otto of Schicksal dispatched a special task force to investigate the incident. No one realized that this mysterious event would quickly escalate to global proportions.
 
(Source: Honkai Impact 3rd)