Does Nico Robin join the crew again?
Nami rejoined after the defeat of Arlong, who blackmailed her into betraying the crew, while Robin rejoined the crew after they convinced her that they would stand by her even if it meant declaring war on the World Government, and saving her from Enies Lobby and probable incarceration at Impel Down.
Does Robin join the straw hats again?
Robin: My waifu Robin makes her debut in episode 67, joins around 129–130, leaves again in episode 240 (her declaration of leaving), leaves with Blueno & leaves the Straw Hats stranded on the train in episode 263, and permanently joins the crew around 310 when they escape Enies Lobby after CP9 is defeated (though she