Captained by the Worst Generation rookie Trafalgar Law, this North Blue band earned fame during the timeskip. A smiling flag, a hospital-equipped submarine, and their pact against Doflamingo and Kaidou set them apart from most crews of their origin.
Where most bands from Law's home sea fly a skull with crossed bones, this one chose a grinning face instead. Six points spread outward from that mark, leaving it much like the Donquixote emblem yet free of the cancel stroke Doflamingo lays across his. Read as a quiet tribute to Rosinante, who once asked Law to hold onto an image of him smiling, the grin stands in pointed contrast to a brother's cruelty.
The roster runs to twenty-one. Setting aside the captain and navigator, each crewmate wears a lilac boiler suit bearing the badge above the left breast. Freed from bondage, Jean Bart began in nothing more than a plain black shirt, and only after the two-year gap did he switch to the shared uniform. Padding the on-screen tally are a handful of faces treated as non-canon, among them the recurring gag character Pandaman.
Merely arriving at Sabaody proved their worth, and signing on the famed Jean Bart honed it further. Gathered at the Human Auctioning House, every member weathered a surge of Rayleigh's Conqueror's Haki, though Shachi confessed he nearly fainted. Like their fellow Supernovas, they escaped Kizaru and reached Marineford as the great war raged. Since Law would later occupy a Warlord seat, the crew's fame and force are assumed to have grown alongside his.
Icy seas suit them. Raised beside chilly northern harbors, they thrive in fights waged on and below the surface, an advantage that lets them hold the line against heavyweights such as the Blackbeard Pirates in open water. Their teamwork is tight, with attacks and guards launched in concert. The submarine they call home carries a complete operating theater, matching Law's gift as a surgeon. Toppling Kaidou and Big Mom in Wano raised their standing still higher, yet an Emperor's crew outmatched them at Winner Island, where Blackbeard's forces broke them despite grave wounds dealt in return, Bepo shielding Law as they slipped away.
Law hoists this banner after a bitter youth. From the age of ten he rode with Doflamingo on raids while Amber Lead Syndrome gnawed at him, staying on until he turned thirteen and departing once Corazon was slain. He fled to Swallow Island, sheltered with the scientist Wolf, then met a bullied mink named Bepo whose tormentors were two young toughs. After Shachi and Penguin turned on him and lost, all three attached themselves to Law, and that knot of friends grew into the crew that fought through Paradise to Sabaody.
As navigator, the polar-bear mink Bepo is Law's oldest ally, and Shachi and Penguin fill out the founding three. Jean Bart, a liberated slave and onetime captain, is the sole member outside the crew's cold-weather naming pattern; Ikkaku, Uni, Clione, and Hakugan take their names from a narwhal, a sea urchin, a sea slug, and a snow goose. Named the Polar Tang, the sub served as both refuge and ride, once outracing Aokiji's Ice Age and dodging Kizaru's light before Blackbeard's crew wrecked it. Of that last rout, only Law and Bepo are confirmed survivors.

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The Heart Pirates are a North Blue crew captained by the Worst Generation rookie Trafalgar Law, known for a grinning smiley-face flag, a hospital-equipped submarine, and a pact against Doflamingo and Kaidou.
Besides Captain Trafalgar Law, the Heart Pirates' core members include the polar-bear mink navigator Bepo, founding crewmates Shachi and Penguin, and the liberated slave and onetime captain Jean Bart, with a total roster of 21.
The Heart Pirates helped topple Kaidou and Big Mom during the Wano campaign but were later mostly defeated by Blackbeard's forces at Winner Island, with only Law and Bepo confirmed to have survived.
The Heart Pirates were overpowered by the Blackbeard Pirates at Winner Island, an Emperor's crew that destroyed their submarine despite the grave wounds the Heart Pirates dealt in return.
The Heart Pirates' submarine, the Polar Tang, carries a full operating theater matching Trafalgar Law's skill as a surgeon and once outraced Aokiji's Ice Age before Blackbeard's crew ultimately destroyed it.
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