Wonder why so few animated films these days star women? It’s because of women’s emotions, duh. Lino Disalvo, the head of production on the new film Frozen (which has not one, but two female leads), told Fan Voice that “animating female characters are really, really difficult, ‘cause they have to go through these range of emotions, but they’re very, very – you have to keep them pretty.” Unfortunately when Disalvo might have gotten himself into a hole but then he kept on digging. “Having a film with two hero characters was really tough, and having them in the scene and look very different if they’re echoing the same expression; that Elsa [Idina Menzel] from Anna [Kristen Bell] being angry.” Oy. Well women everywhere can at least rejoice that apparently they weren’t the most difficult part to animate: Disalvo also describes his difficulty in animating women.
Because of emotions and "you have to keep them pretty."