Its Fact Time!!!
Lucy, Natsu, and Happy
These are the first main characters in the show.
Gray is the next character you meet.
This is the character you meet after Gray and she is an S class wizard which means she is really good in combat.
People who made Fairy Tail
Hiro Mashima made Fairy Tail. It first aired in 2012. The main characters are Natsu Dragneel, Lucy Heartfilia, Happy, Erza Scarlet, and Grey Fullbuster.
some people might think there strong but if you cant beat the S class wizards then there's gonna be a problem there. So maybe if your favorite character doesn't make it then just keep believing.