Lucy Heartfilia (ルーシィ・ハートフィリア Rūshii Hātofiria, named after the Beatles song "Lucy in the Sky with Diamonds".) is the primary female protagonist of Fairy Tail. She is a 17-year-old celestial wizard (星霊魔導士 seirei madōshi) who uses a set of magical Gatekeys (門ゲートの鍵 Gēto no Kagi) to summon celestial spirits. She also fights with a whip, which she upgrades to the extendable energy whip Fleuve d'Étoiles (星の大河エトワールフルーグ Etowāru Furūgu, French for "River of Stars"). At age 16, Lucy flees from her home to pursue her dream of joining Fairy Tail. Her efforts lead into conflict with a slave trader named Bora, and Natsu Dragneel and Happy rescue her in exchange for her joining Fairy Tail. She performs guild-posted jobs alongside Natsu and Happy to fund her rented house in Magnolia, and is bewildered by her guildmates' antics. She is also an aspiring novelist, and writes letters of her adventures to Layla Heartfilia (レイラ・ハートフィリア Reira Hātofiria), her deceased mother. Eventually, Lucy possesses 10 of 12 golden keys that allow her to summon the rare and powerful Zodiac spirits and also gains the ability to don magical Star Dresses (星霊衣スタードレス Sutā Doresu) that allow her direct access to her zodiac spirits' powers. Unlike most celestial mages, she sees spirits as living things with feelings and fights alongside with them while in battle.
- Very Best Friends - Natsu Dragneel, Happy, Gray Fullbuster, Erza Scarlet, Wendy Marvell, Carla
- Best Friends - Luke Skywalker (her mentor and her Jedi Master), Ahsoka Tano (her Jedi Master)
- Friend - Natsu Dragneel
- Mother - Layla Heartfilia
- Father - Jude Heartfilia