Bela thought that all things considered her time in hell could have been a lot worse. Other souls clung to their humanity when they arrived here but Bela understood the way it worked and used it to her benefit. The faster you lost it the faster you turned. And then you got out so fresh souls could be tortured.
She accepted what was happening, demonified and worked her way as a crossroads demons. When her boss Crowley managed the Coup of becoming king of hell she bided her time. She could see herself as the perfect monarch. She made plans