Misty did her best to keep her face blank when he said that mermaids or sirens weren't real. She knew otherwise, but was kind of glad he didn't think they were. Course at the same time it was slightly disheartening. When he said he would get along with her father, she fought a laugh. Her father would kill her if he knew she was on land talking to a human. 

Her thoughts quickly shifted when she heard someone walking through the woods quietly. They weren't alone and that scared her, no one else ever came on this island and she didn't want to leave Shane alone to face whatever it was, but she couldn't take him into the ocean with her for safety if it came to that.