User blog comment:FairyRaven/Fairy Tail Chapter 377, 378: The Sky Dragon's Rage & Friends Forever, Review and Commentary/@comment-24467372-20140328094428/@comment-7418318-20140328101449

It's absolutely in character for Wendy. She's been idolizing Natsu from the very first chapter she appeared in and from her comments probably even before she ever met him and she's learned several of her fighting techniques by copying them from Natsu's attacks.

While other's imitating Natsu was just stupid (I'm looking at you Sting!), for Wendy it's just a natural continuation of how she was from the very beginning.