Raven was originally named Natasha Cioara and was born in Siberia. Following the Second Honkai War in which she gained strong Honkai resistance, she was selected by the Gray Serpent and was forced to leave her brother behind. Natasha received training and became a mercenary subject to the World Serpent.
In 2000, when the core of Herrscher of the Void was out of control, a huge amount of Honkai energy overwhelmed the entire Siberia and caused its people to become corrupted. Thanks to the sacrifice of Cecilia Schariac, most people, including Cioara and her brother, have survived under the protection of the Holy Blood of Schariac. However, Cioara gained resistance to Honkai and was taken away by the Gray Serpent, and was trained as a combatant of World Serpent. Her appearance underwent many changes during that time and she'd be given the codename "Raven".
Creating the Roost
After the Third Honkai Eruption in 2014, Raven found some children with incomplete stigmata marks in the ruins of Nagazora. She taught the children how to survive in the rubble, and they called her "sensei". Every month or 2, Raven would return to Nagazora with supplies and medicine, and tell them to live well. The children couldn't survive in the safe, outside world where Honkai levels were much lower due to their incomplete stigmata and Raven would be spending years planning where to move them.
However, Jackal ended up being directly confronted by Otto and Raven had no choice but to use 3rd Divine Key to destroy Otto's avatar and help Jackal escape. They eventually returned without success as Schicksal would lay their hands on the 2nd Divine Key.
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