Bariza/Barzillai the Iron Battle Maiden

Kusari Kusari no Mi- The Chain Chain Fruit
Paramecia type.
User is capable of controlling chains as if they were an extended limb of their body. This includes chains they are not directly connected to. Meaning they can manipulate things like Seastone chains as long as they aren't touching them
[7/11/2014 2:38:01 AM] Keen Mohler: Though I have an idea of her (the wielder that is) having the chains sorta subconsciously coming to her body and wrapping around. So she avoids seastone like most Devil Fruit users.
[7/11/2014 2:48:33 AM] Keen Mohler: basically under her overcoat she is wrapped in chains

Previous high bounty pirate, wore a mask all the time, presumed dead. Her unmasked 'alter ego' not known, though the hint of her weapon and devil fruit powers might be REALLY big red flags. Though she presumably died four years ago.
[Sunday, July 13, 2014 11:55 PM] Keen Mohler:
<<< She probably would use her mask similar to how Usopp does. Her normal persona is not well known, so she can easily be ignored by enemies. Her masked one has a  decent sized bounty upon it.Anyways. Her unmasked persona is a snarky bitch who has a bit of a silly streak in her. She is very serious about her jobs as both a warrior and a navigator, but isn't too proud to have a bit of fun with her friends. She can sometimes act like a butler to her crewmates, but it's more of like Alfred. That snarky sort of butler who pokes fun at people.
[8/10/2014 6:50:43 PM] Keen Mohler: Her masked persona is a bit of a berserker persona, as she lets all of her rage out when she's wearing her mask.
[8/10/2014 6:52:39 PM] Keen Mohler: She uses her chains to subdue her foes or swing her custom machete at people.
Also, just so you know, she has that shaved sides, long middle hair. The hair droops over her left side, which hides a Zuuko style burn scar.