Barem Bridge

"Hmmm. Everyone really loves Ms. Makima, don't they?"

Flamethrower Hybrid (real name unknown) is a human-devil hybrid that merged with the Flamethrower Devil and serves as a minor antagonist in the Control Devil arc, where he faces the Chainsaw Devil.

Human Form
The Flamethrower Hybrid's human form is that of a tall man with relatively long black hair, the hair having a strand that hangs down on the Hybrid's forehead. He wears a standard Devil Hunter uniform consisting of a suit and tie.

Hybrid Form
When transformed, the Flamethrower Hybrid has his head transformed into three huge fuel tanks while his neck becomes a jumble of metal parts. The Flamethrower Devil Hybrid's arms transform into giant flamethrowers that serve to attack his enemies.

Personality
Flamethrower Hybrid's personality is currently unknown, as he was mind-controlled during all of his appearances. However, he taunted Denji before setting him on fire and was observant enough to notice that he was weakened in the final fight.

Control Devil arc
At an unknown point of time, the Flamethrower Hybrid was brainwashed by Makima to serve her needs. He is summoned as part of Makima's newly-formed Special Division 5, a team of weapon hybrids created for the sole purpose of battling the fully-powered Chainsaw Devil. While under Makima's control, he comments about how everyone in the group adores Makima.

Once Makima commands Special Division 5 to attack, each member activates their weapon trigger, transforming into their Hybrid forms. They all leap from their respective spots to lunge straight towards Chainsaw Man. Before any of the Hybrids can land a single blow on him, they are all blown back by Chainsaw Man leaping forward from the building he stood on to initiate the fight.

After Chainsaw Man beheads Katana Man, the Flamethrower Hybrid appears on the bottom floor and aims his two flamethrowers at the ceiling. Screaming in excitement, he unleashes a large torrent of flames, creating a large explosion that forces Chainsaw Man to escape the building. He is eventually torn to shreds alongside the remaining Special Division 5 members after Chainsaw Man withstands their combined attack of sending him into space.

At some point in the future, Special Division 5's Hybrids are revived once more by Makima, who brings them all to a graveyard to confront Denji. Once Makima finishes monologuing her thoughts of erasing anything she dislikes to Pochita (who is disguised as Denji), the Flamethrower Hybrid and the other Weapon Humans transform into their Hybrid forms for the final battle.

During this confrontation, he attempts to burn down Pochita once the latter is piled up by a group of zombies from the Zombie Devil. Unfortunately, Pochita uses his chain whips to latch onto two grave markers, and launches himself straight towards Makima's group using his chainsaws to slice the Flamethrower Hybrid in half.

Hybrid Powers

 * Hybrid Transformation: By making a sign by putting his thumb behind his teeth, he can transform into a hybrid with tanks for a head and flamethrowers for hands.
 * Augmented Body: Flamethrower Hybrid has strength, defense and speed well above average for being a hybrid, being able to match beings like Katana Man and Chainsaw Man.
 * Flamethrowers: Flamethrower Hybrid can fire powerful blasts of fire from his flamethrowers, they are strong enough to cause explosions that reach an entire floor of a building and set an entire horde of zombies on fire.
 * Blood Consumption: As a hybrid, Flamethrower Hybrid is able to heal wounds by consuming blood, regenerating his entire body.
 * Nigh-Immortality: Due to being a hybrid, Flamethrower Hybrid is immortal and nearly unkillable.