Beatrice is a major, and tragic, character in the video game Dante's Inferno, and the resulted anime film adaptation. Based on the real life character and lover of Dante Alighieri, Beatrice Portinary, her design was inspired and influenced by Dante, on purpore to create another namesake character in Dante's Divine Comedy.
In Dante's Inferno, Beatrice was the lover of Dante, before her death in the mortal plane. She was captured by Lucifer, in Hell, and transformed into a massive and rogue beast, where there she challenged her former lover, before her ultimate defeat by Dante.
Regarding the villains wars, Beatrice appears only in flashbacks, during the events of the second Disney vs. Non-Disney Villains War.
Disney Vs Non Disney Villains War - Part Two
Beatrice assumes a different role, appearing as the wife of Shan Yu. She was brutally murdered by the Fire Nation's forces, led by Fire Lord Ozai, not before seeing her husband for the last time, and leaving her final breath, at her husband's arms. The flashback is later mentioned by Shan Yu, as he explained the reasons of hatred, towards to the Fire Nation.