Also, why does she only have two kick ass abilities. Three elements, three permutations assuming the order doesn't matter. It was water, fire and earth. So she should have three abilites, water + fire, fire +earth, and earth +water. I would think that the lava is fire + earth but that doesn't explain the fog. Wouldn't you need earth to control the ph of the water, and fire to vaporize it? Unless you can inherently control the ph level of the water with water alone. Assuming that we have water + fire, fire + earth. That leaves earth + water.
That or all three elements are used for both. That makes more sense to me, for such powerful abilities, but I just don't see why water is necessary for spitting lava. Maybe to keep her mouth cool.
Yes, I'm over-thinking this.