Everything goes for the mighty Leblanc!
The syndicate headquarters are in the old Guado manor in Guadosalam, where all the former Guado leaders, such as Jyscal and Seymour, resided—and which Leblanc herself refers to as Chateau Leblanc. Only syndicate members are allowed entrance, and the syndicate members take turns in guarding the entrance.
The syndicate is led by Leblanc and her two lackeys, Ormi and Logos, who were previously Yevonites forced to do the Maesters' dirty work. A number of other Spirans have joined, wearing syndicate uniforms—some who were thought to have died in the disastrous Operation Mi'ihen, and others being rogue Al Bhed who have never forgiven Cid for destroying Home. The syndicate members admire Leblanc for her kindness to them, and thus are blindly loyal to her.
Acting as rivals to the Gullwings, the Leblanc Syndicate often compete with them for the same treasure spheres. During one such encounter, Leblanc steals Yuna's Garment Grid, planning to perform a concert in Luca in Yuna's likeness and cash in on her fame and ruin her image.
Yuna, Rikku, and Paine pursue Leblanc to reclaim the Garment Grid. While Rikku and Paine gatecrash the concert and confront Leblanc, the real Yuna dons a Moogle disguise and keeps a low profile. In the end, Leblanc returns Yuna's Garment Grid and retreats with her goons.
Leblanc and her gang would later follow the Gullwings to the Floating Ruins at Mt. Gagazet, and try to race to the top to get the treasure sphere located in the ruins first. Unfortunately, Leblanc, Logos, and Ormi get stuck near the top and the Gullwings take possession of the sphere. When YRP return the "awesome sphere" from Kilika to either the Youth League or New Yevon, Leblanc, Logos, and Ormi break into their airship, and steal the sphere half they found in the Zanarkand Ruins.
When Yuna, Rikku and Paine discover the Leblanc Syndicate had robbed them, they decide to search around for syndicate uniforms to sneak into their headquarters. After finding the three uniforms needed, the girls infiltrate Chateau Leblanc. YRP find out that Leblanc stole their half sphere because she already had the other half. The girls are eventually discovered and forced to battle Leblanc, Logos and Ormi together. Suffering defeat for the last time, Leblanc shows the record from the now whole sphere, that depicts Vegnagun, a colossal machina weapon hidden underneath Bevelle.
Recognizing Vegnagun as being capable of destroying Spira, Leblanc forms a truce with the Gullwings and accompanies them to Bevelle. In the hole made by the fayth's disappearance, the two groups discover the Bevelle Underground, a hidden complex filled with machina. Arriving at Vegnagun's location and battling a corrupted Bahamut, Vegnagun is nowhere to be found and a deep hole is left in its place.
The Leblanc Syndicate members are referred to as "goons" when fought as enemies, and appear to be continuously afraid of being fired, to which they refer to as "getting the heel". The uniform consists of a mask and a skin-tight outfit, pink for women and army green for men. The Syndicate also use machina snakes that they can call during battle.
The Goons and Fem-Goons both use physical attacks in battle, but only the latter is capable of using Black Magic.
Leblanc (pronounced leh-blonk) is a contracted form of le blanc, "the white" in French. Blanc is the masculine form of the adjective; blanche is the feminine form.
Given her thieving nature, she may also be named after Maurice Leblanc, author of the novels about the master thief, Arsène Lupin.