Quote 13
It isn't enough, what I've done in the past, defying the Capitol in the Games, providing a rallying point. I must now become the actual leader, the face, the voice, the embodiment of the revolution. The person who the districts—most of which are now openly at war with the Capitol – can count on to blaze the path to victory. (1.28)
Even though Katniss is being asked to step forward as "the actual leader," her power will still be limited. She'll be like a glorified figurehead, a "rallying point" around which other people will come together. She'll <em>appear</em> to have tremendous power and to become the "embodiment of the revolution" itself, but she won't actually be the one making decisions – that's President Coin.
Quote 14
"Punishing my prep team's a warning," I tell her. "Not just to me. But to you, too. About who's really in control and what happens if she's not obeyed. If you had any delusions about having power, I'd let them go now. Apparently, a Capitol pedigree is no protection here. Maybe it's even a liability." (4.30)
Perhaps even more dangerous than not having any power is thinking you have power that you don't. Katniss can see this more clearly than Fulvia; previous power isn't translating to power in the current regime. In fact, it can actually mark out someone as even more dangerous.
Quote 15
A new sensation begins to germinate inside me. But it takes until I am standing on a table, waving my final good-byes to the hoarse chanting of my name, to define it. Power. I have a kind of power I never knew I possessed. Snow knew it, as soon as I held out those berries. Plutarch knew when he rescued me from the arena. And Coin knows now. So much so that she must publicly remind her people that I am not in control. (7.35)
Here is where Katniss's "power" starts growing inside her, like a flower. Everyone else has known all along: all the other people in positions of power and authority recognized that same power in her. She's the only one who didn't. In other words, she didn't know her own strength, but now she's beginning to find out. And that only makes her more dangerous.