Trebol holds the Club seat among the Donquixote Pirates' three elite officers, doubling as the crew's staff officer and Sugar's bodyguard. Having first nurtured Doflamingo's cruelty, he fights with the sticky Beta Beta no Mi and counts as one of the Dressrosa Arc's major threats.
A hunchback of enormous height, Trebol still rises over his own captain, his body wrapped in a frayed coat spun from the mucus of his Devil Fruit, slime forever sliding off its lower edge. Shaped to fake a barrel chest, that coat makes him look like a stocky man under a loose cloak, when in reality he is bone-thin and everything beneath his bent torso is a mucus dummy, giving him the outline of an oversized snail. His feet stay bare apart from a pair of unconnected ankle shackles.
Behind his usual sunglasses sit small slanted eyes, and snot dangles endlessly from his wide, flat nose. A bowl cut tops a heavy beard, his teeth are rounded and spaced apart, and a faint scar sits just above the right brow. He grips a scepter capped with a club symbol that conceals a lighter for setting his mucus aflame. In boyhood the coat was absent, yet the dripping nose was not; he wore a bowler hat, the same shades, and torn rags, every bit the street child who had to scavenge meals.
Trebol pays no mind to personal space and crowds in on anyone he addresses, and he is loud, coarse, and tactless, casually prodding Baby 5 about her slain fiances or proposing to her in jest to guilt her into cooperating. Violence comes easily to him; he flung a vessel at the Officer Tower with no regard for Sugar's danger and cheerfully torched captured dwarves while jeering at their belief in Usopp. Rude as he is to subordinates, he will tolerate no insult aimed at the Donquixote Family, erupting in fury when a soldier snickered at Pica's voice or when Law degraded the officers.
His confidence runs absolute, sure that his mucus can pin down anybody and that Doflamingo is the true ruler of Dressrosa. Such arrogance makes him careless and prone to dismissing his opponents, which leaves him reeling whenever events escape his control, as with Sugar's collapse or Law's reversal. Most of all he venerates Supreme King Haki, the trait that first compelled him and the others to bind themselves to Doflamingo. He laughs with a trademark "Behehehehe" and, in a nasal drawl, opens what he says using "Ne," sometimes doubled into "Ne, ne."
Seated at the Club position as staff officer, Trebol ranks among the mightiest of the crew right under Doflamingo and led the Trebol Army, a unit of special-power users that counted Sugar, Violet, and Giolla. At only eighteen he took part in burning an entire town to the ground, and by thirty-nine he and his fellow officers Diamante and Pica overwhelmed the whole army of Dressrosa. His Devil Fruit, the Paramecia-class Beta Beta no Mi, grants him the power to generate and steer mucus of great thickness and stickiness. He clings to walls and ceilings, traps and suffocates foes, even pins entire ships, and snaps off mucus bullets at lethal speed; Robin remarked on his aim after he downed a fly mid-flight and punched clean through a wall built from three reinforced concrete layers set behind it. Because the mucus ignites from the tiniest spark, he weaponizes the explosions, and he recolors it to mask his thin frame within a padded false torso.
His bulk hides real speed, agility, and raw power, enough to heave a giant ship and whip it around to wreck the Officer's Tower. He also draws on Armament and Observation Haki and fights with a club-topped staff that serves as both lighter and a stabbing tip. Long before crossing paths with Doflamingo, Trebol assembled a crew alongside Pica, Diamante, and Vergo, and the band recovered the Ito Ito no Mi. Spotting the young Doflamingo's Supreme King Haki, they swore loyalty and presented him with that fruit and a flintlock. Through the Dressrosa Arc he shielded Sugar, seized and tormented the dwarves, and confronted Luffy and Law on the palace roof, where Law locked him down with Radio Knife, lured him into a deadly opening, and gravely wounded him; his bid to detonate them both failed, and once Doflamingo went down the Marines took him into custody.

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Trebol was gravely wounded during the Dressrosa Arc when Trafalgar Law locked him down with Radio Knife and lured him into a fatal opening. His attempt to detonate them both failed, and after Doflamingo's defeat the Marines took him into custody.
Yes, Trebol ate the Beta Beta no Mi, a Paramecia-type Devil Fruit that lets him generate and control extremely thick, sticky mucus for offense and defense.
Trafalgar D. Water Law defeats Trebol on the Dressrosa palace roof, using his Radio Knife ability to trap Trebol and inflict a grave wound before the Marines arrest him.
Trebol serves as one of Donquixote Doflamingo's three elite officers, holding the Club position as staff officer of the Donquixote Pirates and bodyguard to Sugar. He was also one of the original crew who discovered Doflamingo's Supreme King Haki and swore loyalty to him long before the Dressrosa Arc.
Trebol appears as an enormous hunchback taller than his own captain, wrapped in a frayed mucus coat shaped to fake a barrel chest, though beneath it he is bone thin, giving him the outline of an oversized snail.
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