Benares was a large draconic Judgment-class Houkai Beast that rampaged in the 2nd Houkai War in February, 2000 under the 2nd Herrscher's command, more precisely, serving as the main supporter and ally of Herrscher of the Void in her quest for genocide. She was born at the same moment Sirin became a Herrscher and assisted her to become stronger
After Sirin met with the Will of Honkai, she gave Benares its human form. This form was given the name "Bella"