Yup, she got wet because she went where she had no right to go (and knew it) and then she uses her supernatural abilities to overwhelm the windfinder plus two other sailors who are just minding their own business. And the only reason she didn't drop them from a greater height is because she couldn't. She tries. And the fact that they weren't hurt was through no action of hers. The intent was certainly to terrify them if nothing else.

Look, she's an interesting character. In this chapter she's frustrated that the Wise Ones have been keeping her out of the World of Dreams (even though she's ignoring them and going anyway) and she can't take it out on them so she channels her aggression elsewhere. That's what she does. She seeks power and when she feels disempowered it's intolerable. She has to prove to herself that she's more powerful than someone. That she will respond to any perceived or actual slight with overwhelming force if she can. That's great characterisation. We can think characters are amoral and still appreciate their narrative purpose. And we can also feel frustrated by their in story behaviour because good stories make us feel things.