Rather juvenile at times, absolutely a power fantasy where characters get introduced, shown how evil they are, then end up getting recruited to her side because she easily finds their weaknesses offscreen (you would think it'd be a bit harder to get documents that contain all of a person's illegal activities) and become completely compliant–often even loyal–servants.
Not actually a villainess, more a child that looks up to the concept of someone who just does whatever they want without caring about other's opinions and calling that a "villainess".
Saying it's just Eminence in Shadow but the protagonist is a girl is pretty accurate. On the bright side that means her followers aren't all busty women who would meat-ride in a heartbeat, so I actually got farther in this time before ultimately deciding it's not for me.