Squard

Tall, lean, and pale, Squard is bald across the crown while long, light-pink waves spill down past it. He tends to loll his sharp-toothed tongue out of his mouth. A spider mark with a spiraled tail sits on his forehead, fixed in place by a slanted headband; below he wears a ruffled grey coat over a paler shirt, dark high-waisted trousers buckled and tucked into boots, a deep red tie, and heeled black boots trailing loose white cloth.

Loyalty runs deep in Squard, who swore himself to Whitebeard and would gladly die for his friend Ace. Yet he nurses old wounds. Roger's slaughter of his original crew bred a hatred so consuming that it bled onto Roger's son, and that raw nerve let Akainu deceive him into believing Whitebeard meant to sacrifice his allied crews. When Whitebeard gently told him not to blame children for their fathers' sins, Squard finally let the grudge go and broke down in tears.

More than twenty-four years ago Roger wiped out every one of Squard's crewmates save Squard himself, planting a lifelong hatred of the Pirate King. Alone and adrift, he was taken in by Roger's rival Whitebeard, who treated him as a son; he rebuilt his crew and befriended Ace, unaware of the boy's parentage. A respected veteran and skilled swordsman wielding both a normal katana and an oversized blade, he was Whitebeard's first pick to lead the counterattack at Marineford, where dozens of allied crews sailed to save Ace.

Exploiting his shock at learning Ace's lineage, Akainu convinced him Whitebeard had betrayed them all. Squard returned to the Moby Dick, pledged his loyalty, then drove his giant blade through Whitebeard's gut, a sneak attack Marco called all but impossible. After confessing his reasons, Squard was embraced and forgiven by Whitebeard, who went on to war and left him weeping on the deck. Seeking to atone, Squard charged the Marines alone to cover the others' escape until Whitebeard halted his ship, refusing to let a son die before his father.

He grieved with the rest of the crew when the Blackbeard Pirates gunned Whitebeard down. The anime adds a flashback of his drunken, ruined years before Whitebeard adopted him, and explicitly shows him at the funeral the manga leaves ambiguous.