Astrid in Vinland also uses the same face as Elsa (which I happen to think of as 'the Elsa face'), though Elsa happens to be the prettiest use of it by far, in my opinion.
Not terribly slow, no. There's a kind of two-or-three-way morality system to it, you get the occasional choice to either use the power of love, the power of domination, or neither. Actually, I'm not really sure if there really are two routes or three because of the way it plays out. Of course, even if 'power of love' sounds wholesome, it is effectively mind control a la love potions and stuff like that, so not entirely benign, either. Not that the main character ever seems to think about this.
