hey i just started to watch one piece atm because i got nothing better to do,so can somebody who is watching it already tell me who is that girl Nami chasing after??(after her brother or the person she loves?)(and also in one of the movies in description said that she might leave the "straw hat" to join the enemy??)so can somebody please gimme a description of what is happening,and who is she chasing after,TY