A supporting character in Honkai series.
A wielder of the 5th Divine Key Abyss Flower, she was considered to be the most powerful S-Rank Valkyrie after Kallen Kaslana and Reanna Brigantia and before Durandal. She was the wife of Siegfried Kaslana and the mother of Kiana Kaslana.
Cecilia died during the events of the Second Eruption.