The Strawhats needed a distraction. They couldn’t use Robin, they needed her for the mission! But you had a nice enough body, and Usopp could pretend to be your body guard.. so here you were, in a revealing dress, dancing for drunk marines so your crew could rob them.

You were getting into your element, and your dancing became more natural; you were enjoying yourself.. and Usopp was enjoying it, too. He was a blushing mess.