* In the manga, Lucy is initially 17 years old and celebrates her 18th birthday in Chapter 152. However, the manga timeline isn't perfectly consistent.
* In the anime, Lucy's age is a bit more fluid, with some episodes showing her celebrating her birthday in a way that implies she is still 17, even though she is already 18 in the manga.
Overall, it's safe to say that Lucy is 17-18 years old throughout most of the series.