Lucy Heartfilia is the protagonist of Fairy Tail. She is a blonde haired girl who had rich parents, but now she has fun friends that she goes on adventures with.
Despite being the show's main star Lucy doesn't seem to be the show's most popular charactes. Natsu, Erza, and a few other characters tend to be more liked by the fans. Of course fans can dislike and like who they want, but I personally think that Lucy is the best character in Fairy Tail.
1 major reason why Lucy is the best character in Fairy Tail is that she's the most well written. Her storylines are far more complex and interesting than the other characters' storylines. Natsu and Gray pretty much stay the same throughout the show, but Lucy goes from being a wannabe hero to actually being a hero. She goes through lots of friendships and rivalries and learns so much.
Lucy may not seem as useful at solving conflicts as Natsu, Gray, and Erza, but she has the greatest power of all: a big heart. Lucy lives up to her corny last name by being the sweetest member of the team. She manages to solve conflicts with her big heart. For example she saved Loke's life in season 1 by using her intelligence and heart.
Ironically 1 of Lucy's strongest qualities is that she has flaws. She occasionally acts immature and struggles to figure out what to do. Despite seeming like a unhelpful hero at times Lucy proves that's not true by using her brains and heart to make herself a better hero. She is relatable and inspiring to people who feel like they're unhelpful.
Lucy often gets accused of being nothing more than good looking which I disagree with. Just because people think Lucy is good looking doesn't that people like her just for that. That's like saying that Harley Quinn is the most popular Suicide Squad just because she's considered to be good looking. Lucy is the most complex, interesting, relatable, and likeable character in Fairy Tail.