Carol

Carol Masterson is Daddy Masterson's daughter, whom Usopp meets at a goggle shop, in the Loguetown Arc.

History
Usopp was in a shop where he wanted to buy a "Better" pair of goggles for his adventures at sea, and, while he was trying to find his money, Carol came in and bought the goggles for her father. Then Usopp told her that he is a fearsome pirate with many followers. Carol find her father, Daddy Masterson who is a bounty hunter and told him about Usopp. After Daddy challenged Usopp to hit the wind rooster, he succeeded and Carol gave the goggles to him.

Early One Piece
Carol, along with her father, are absent from the One Piece manga storyline. However, they were part of the Loguetown arc but were dropped so Oda could start off the adventure on chapter 100. However they are both featured in the Loguetown filler episodes and the Loguetown Novel. There are differences between these two versions and both Daddy and Carol have varied appearances.