She was the 3rd to join up with Luffy and sail with him. But by the time Baratie arc roll around she disbands from Luffy, Zoro and Ussop. Turns out she played them like a fiddle. So Luffy defeats Krieg blah blah blah yadda yadda zeff is a shit-geezer w/e. Were on to the Arlong Arc, by this time Nami has rejoined the Arlong pirate's(No longer a Mugiwara). Luffy beats Arlong and she rejoins the strawhats making her the 5th to join, because once she left the crew was back down to 3 until Sanji joined making him the 4th not the 5th. So what is she? 3rd or 5th?