Talk:The Dazzlings/@comment-25765540-20141126145751/@comment-10390252-20141126151425

They argue constantly in the film, which makes sense. When you consider the themes of MLP, the idea that the villains are incapable of harmonious existence is a good bit of narrative logic.

In the specific case of the Sirens, I suspect that the anger energy influences their behaviour rather than form a potential alternate source of nourishment.