Beatrice and Virgil share the "same character". In their upgrade, they fuse together and become one, acquiring an older, long, black haired female form with white and black wings, named after Beatrice. See post #4901699.
Origin: The Divine Comedy, a long Italian narrative poem written by Dante Alighieri. Japanese voice actress:Ogura Yui. Upgrade version's Japanese voice actress:Ishikawa Yui.