Mabel is an optimistic, fun, and energetic girl full of spirit. She is an optimist who skips through life with a toothy smile. It is her outgoing personality and fearless curiosity that comes in handy on trips, even if she isn't always aware of her silliness. Despite her cheerful attitude and ability to be able to look on the bright side, she can occasionally get her feelings hurt. Mabel avoids lying and is a terrible liar, often blurting out whatever it is about which she is trying to lie. She is rarely angry or upset and generally, keeps a positive outlook. She is somewhat naive at times. Mabel is aware of her charm and cherishes her cuteness and beauty. However, she has a selfish side, particularly when it comes to boys with whom she's infatuated, even breaking promises made with friends in pursuit of her crush. She has also shown to be self-righteous in her decisions, which can be far from justified, or they may accidentally backfire in some way.