[Katara is slightly startled at his voice, and it's fortunate that she recognizes him in time to keep a stream of water from freezing him to the tree.]
Oh! Leonardo. Hi. [She lets the water she's been practicing with fall.] You startled me. What are you doing out here?
[action]
Oh! Leonardo. Hi. [She lets the water she's been practicing with fall.] You startled me. What are you doing out here?