Milly's nature could be defined as feisty or spunky. She struggles with her temper, getting into fights with fellow students on multiple occasions. It can be inferred this is due to her experience with bullying. When first entering school, it is shown that Milly was not only intimidated and bullied by Zoey, but she was also viewed as wild or out of control to other students. While she may appear to deny it, Milly does seem to care what others think of her behavior.