Bakara-gunsou (Sergeant Baccarat) emerges as an eight-headed demon warrior within the Bikkuriman 2000 narrative. Serving initially under Charisma Devil X within the antagonistic forces, he ultimately defies his commander's orders. This rebellion results in his capture and forcible brainwashing to ensure obedience. The brainwashing shatters when struck by the protagonist Takeru's fist, restoring Bakara-gunsou's original mind. Freed, he allies with Takeru for the final clash against Charisma Devil X, wielding custom firearms as his primary weapons.

He operates with two constant subordinates: Pinzoroid, a robot with a dice-like body, and Dandylar, a masked demon woman providing comedic relief. These minions assist him in endeavors like the attempted kidnapping of Tensuke Pouch. Both Pinzoroid and Dandylar eventually cease appearing in the narrative, their ultimate fates unaddressed.

Aspects of his design and role are reflected in merchandise and media. A plush toy depicts him in multicolored form, wearing a hat and a backpack equipped with screens noted to deteriorate over time. Within the card game adaptation, he is grouped with Pinzoroid and Dandylar under the "Nekketsu Gambler" (Hot-Blooded Gambler) Toku Yaku (special combination), signifying their collective thematic association in gameplay. The character is also acknowledged through the anime's ending theme, "Baccarat no March."