Who would Usopp marry?

6 Fans Are Behind: Usopp X Kaya Usopp and Kaya, on the other hand, might as well just be a confirmed pairing by mangaka Eiichiro Oda himself. They both like each other. They have also made it known; it’s simply a matter of Kaya surviving until Usopp makes it through the Grand Line, and their pairing is sure to happen.

Does Usopp have a girlfriend?

Usopp has developed a deep liking for Kaya as well, and it was partially because of her that he refused to give up on the Going Merry despite it having been already doomed to sink soon, to the point of nearly severing his bond with the Straw Hat Pirates.