I think it fits her better if that's the last thing that occurs to her without someone to tell her to reign it in. Magic away!  ;)<br/><br/>And it's probably going to be more of a struggle for fire to reign fire in, so perhaps it's better as the backup option if her rain alone isn't enough.<br/><br/>Edit: it should be mundane fire, she just firebent it, Zuko Style.  :-)