everyone from the crew has a special function
Usopp: ships cannons marksman,story teller, lier.
Zoro&luffy : beat people up.
So the new member must have a usefull function other then being ''cool''
Luffy doesn't care what position each recruit fills. He initially wanted Chopper in the group because of his Zoan powers, not knowing he was also a doctor and only made Ussop cannoneer after seeing him fire a cannon.
Still, considering the skill he showed when steering that ship to Marineford, there's no doubt that Jinbe will be the SH's helmsman.
The argument is that they actually got a position no matter how and why Luffy invited them into the crew.
Barto can fulfill the role of Sunny's protector with his barrieeeers ~~
i feel like the strawhats needs a no purpose fighter like zoro, the crews in the new world are stronger and bigger and i dont think a mere 9 members could take them all on, like shanks crew is quite big too as is.
i vote for next member being a scientist or fishman
Uh, they're already expecting a fishman to join their crew. Luffy invited Jinbe, remember?
I'm also of the opinion that the crew needs another female. Either Rebecca with the Mera Mera no Mi or Jewelery Bonney would be my choices. Bonney would be a long shot though, I actually see her as being the 3rd member of Luffy and Law's alliance(if Oda goes that route with all of the Supernova Captain's forming alliances).
Bartolomeo can be a cabin boy ala Shanks and Buggy.
All the cool kids were saying it soI thought I'd jump on the Bonney for Straw Hat bandwagon as well...joking...a bit. Honestly, a while ago there were theories floating around about her being Whitebeard's daughter, Ace's sister, Big Mam's "other" daughter and I quite like the thought of A.) The possible spawn of a Yonkou joining Luffy's crew and B.) A female Straw Hat that is as capable a fighter as the Monster Trio.
While Rebecca's a fighter, she isn't an experienced pirate and if she were to get the Mera Mera no Mi, she wouldn't be well versed in it's use, and while it would be interesting to see the growth of a new Logia user, I'd prefer the new member to be strong right off the bat since they are in the New World. My opinion will change if Rebecca demonstrates Haki in the D block fights. At least then we'll know she wouldn't just be a newbie logia that'll get stomped in the New World like Caribou and Ceasar.
Speaking of Rebecca, if she gets the Mera Mera no Mi, I can see her being grateful to Luffy for helping her free Mr. Soldier and Dressrosa and deciding to join his crew so that his brother's "Spirit"(Mera Mera no Mi) can see him achieve his dream.
I too believe that Rebecca will get the Mera Mera no Mi and join the Straw Hats as it will mean three things:
1) She'd be the crew's third female.
2) She'd be the crew's third swordsman.
3) The crew would finally have a Logia in their group.
That would be three crewmember aspects everyone's been wanting in one. Who wouldn't be satisfied with that?
And as for Rebecca's strength, don't worry. Lots of people who are strong can't stand up to Luffy. Besides that, why else would she be known as the colosseum's 'Undefeated Woman'? Furthermore, since she's a gladiator convict, she's obviously had to fight for her life in lots of competitions. I'd say that's a good indicator of her strength.
Should there be any new nakama in this arc I am voting for Bartolomeow, Violet or Wicca.
Bartholomeow is a hardcore Luffy fan and has demonstrated that he is willing to bash in heads should people speak ill of him. Though extreme, I still like his dedication.
He has a brass personality that is reminiscent of Pre TS Franky. His addition will greatly improve the crew's overall strength as he has an impressive DF and is a NW capable fighter. The events of Logue Town inspired him to piracy and he has been 'stalking' Luffy ever since. This means that it would be a dream of his to become a member of the future pirate king. However, there are a bunch of things that reduce his chances; Luffy might dislike his over the top violent tendencies and he has more to offer as an ally. I still hope he gets a shot.
IMO Violet has been far interesting than the pink haired Vivi-Shirahoshi copy. All the SH had their respective roles hinted on or introduced earlier on the series. [Zoro-Swordsman. Usopp-Sniper. Sanji-Cook.] We already know that she is an assassin/dancer. Her fighting capabilities seem to be alright so far. Despite received a few panels I have been intrigued with her persona.