Characters in the series.
The titular naughtiest girl, who becomes good.
- The Ace: Easily aces every single lesson and class.
- Brilliant, but Lazy: The first two thirds of the first book is Elizabeth being this, but after she grows more mature, she is not this trope anymore.
- Chaotic Good: Somewhat downplayed. In the first book Elizabeth was definitely not what you call good, yet underneath it all had a kind heart.
- Child Prodigy: A subtle example. No one seems to notice how Elizabeth, having never attended a legitimate school, easily catches up and can be the first in class easily.
- Class Clown: She sometimes fulfills this trope, at least until the teachers get annoyed.
- Class Pet: Grows to become this, even to the teachers.
- Easily Forgiven: In the first book, she is easily forgiven by Harry after slapping him.
- Hero Protagonist: While the titles may have you believe otherwise, the series would be admittedly short if Elizabeth was a villain protagonist.
- Hidden Heart of Gold: Many people including her mother believe her to be this, and Whyteleafe School ends up unravelling it.
- Homeschooled Kids: Elizabeth used to be one of these, until she became too naughty and forced her parents to send her to school.
- Jerk with a Heart of Gold: In the first book, before Elizabeth makes up her mind to be kind and good, she comes across as this.
- Rebellious Spirit: Had a bit of this when she first enters Whyteleafe. She gets better eventually but a bit of it still remains.
- Spoiled Brat: Unfortunately for her parents Elizabeth became this, forcing them to send her to school.
- Took a Level in Kindness: Throughout the events of the first book, Elizabeth undergoes this to the point where she is unrecognizable by her own mother.
Elizabeth's best friend.
- Ascended Extra: Barely got a prominent role in the book before becoming a major character in the second half.
- The Quiet One: Before Elizabeth gets her to speak up, Joan was this. She gets better though.
- The Un-Favourite: Somewhat downplayed, as she wasn't unliked, just accidentally ignored.
- You Should Have Died Instead: Not explicitly stated, but when Joan's mother is calmed by the principals she admits she sort of wanted this.