Nami was in the back not helping You,Luffy,Zoro,Sanji, Usopp, and Ace fight she was just in the background watching it happen while in the Dancer outfit for Alabasta that She, Vivi and You had to wear to fit in with this country

Nami "Well while this unwinds I'll go find some money then~" Nami mutters talking to herself as she walks off to find there money and other stuff