Bronya was born in Siberia in 2000 but was orphaned during the 2nd Honkai Eruption in the same year. She was forced to fight as a child soldier and proved to be a lethal killer. In 2012, she was caught by Cocolia (whom she was sent to assassinate) and admitted as an orphan in Cocolia's orphanage. It turned out that Cocolia was working with Anti-Entropy and running tests on the orphans. Bronya was subject to the test as well, resulting in the destruction of her limbic (emotive) centers and crippling of her legs. Nevertheless, Bronya returned to the real world with a strange robotic symbiont known as Project Bunny 19C. Following her expedition into the Sea of Quanta, Bronya gains the power of a Herrscher and becomes the Herrscher of Reason.

(Source: Wikipedia)