Mozu and Kiwi

Despite not being twins, the sisters are near-mirror copies, differing only in hair and eye color. Mozu's curls are looser than Kiwi's, and her eyes lean brownish while Kiwi's run green. Each has a long, sharp nose, and both share the squared hairstyle that gave rise to their nickname, having worn afros back in childhood. For Mozu, the wardrobe runs to high heels, a set of slacks, a bikini top, goggles in yellow, and a furry white collar. Kiwi instead dons high heels, gloves, pink bikini bottoms, a pink cropped top, and a lilac string of pearls.

The pair shadow Franky at every turn, mimicking his gestures and reactions and adding the occasional comment of their own. Even when not copying him, they often shift in perfect lockstep, each a mirror of the other. Their manner of speech is flagged by a habit of appending waina to what they say. In combat they prove able swordswomen, swinging katana whose guards are square and whose sheaths are boxy. Quick enough to best foes like the Just Eleven Jurymen, they nonetheless cannot overpower the likes of Franky or Kalifa. Working in tandem, their Hull Dismantler Slash has the two sprinting along either side of a target to lay down matching cuts.

Twelve years prior, the sisters had taken the Sea Train's maiden run and hoped to become shipwrights, only to fail Galley-La's tests and slide into drinking. Franky found them and got them sober. Throughout the Water 7 arc they stood at his sides as he counted the Straw Hats' stolen money, stuck close during his fight with Luffy, and fumed at the Galley-La interruptions. When Franky grabbed Usopp to bait the crew, the two cried over his rough handling of Usopp and the Going Merry, then were felled when CP9 stormed the warehouse, Kalifa kicking Kiwi to the floor.

Set on saving the abducted Franky, they joined the Franky Family on the Rocketman bound for Enies Lobby. The sisters pried open the main gate, cut apart the giant Kashii's shoe so allies could knock him over, and sneaked into the gatehouse to unlock the island gate. Each led a squad up a tower to lower the drawbridge, pushing through Marines, agents, and Jurymen alongside Peepley Lulu and Tilestone. They watched aghast as Spandam pushed Franky off the Tower of Justice, then celebrated when Kokoro's Rocketman caught him mid-fall. Caught in the Buster Call's onslaught, the two tumbled off a cliff and were saved by Paulie's ropes before getting away on the Sea Train.

Returned to Water 7, they applauded Franky's decision to construct a new ship for the crew and were stunned by the truths about Garp and Dragon. Following a weepy farewell as Franky set sail, they accepted employment from Iceburg, dubbing him their new big brother. By the timeskip the sisters had become bartenders at Blueno's former establishment, waiting on customers such as Lola and the Risky Brothers.