Talk:Water Boundary/@comment-26993961-20151019165828/@comment-39117959-20191119004235

Maybe  Yukari Yakumo from Touhou Project who is the Youkai of Boundaries

Fro her wiki

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Other than that, since there is a boundary on the water surface so to speak, as there is definitely a distinction between water and atmosphere, and since there is the boundary called the horizon that separates the sky from the earth, as was said, she can freely manipulate the boundary of all existent things at will. According to Perfect Memento in Strict Sense, it seems that not only are physical boundaries, but also the general idea of boundaries are also able to be manipulated, and it seems like she would be able to manipulate the boundary between dreams and reality and open up holes for people to enter into dreams

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She can manipulate the boundary between water and anything else