Lucy is one of the saner and more stable, if not the only one, member of Fairy Tail, having common sense that other members of the guild seem to lack. She consistently points out and laments over Natsu's and the others' idiocy. Lucy is also very confident in her appearance and sex appeal, excluding a certain amount of vanity. Despite this superficial attitude, Lucy is passionate for literature and is in the process of writing her own novel about her adventures with Fairy Tail. She is a member of the Heartfilia family, one of the wealthiest and most influential conglomerate families in the country of Fiore. However, due to her estranged relationship with her father and the death of her mother, Layla Heartfilia, she left home to follow her own path.
Out of all the Celestial Spirit mages revealed so far, Lucy is the only one who treats her spirits kindly. She doesn't use them as shields, she fights alongside them, and treats the spirits as people while others treat them as tools and objects. She will also go to great lengths to give them happiness even if it costs her life. Even though she is technically the owner of her spirits, she denies being called that and instead calls herself their friend. Her dream is to write and publish a book about all the adventures she's experienced in Fairy Tail. It has been shown that she has turned 18 in one issue as it has been one year since she joined fairy tail.