Rubicante

Purgatory's Invitation: Rubicante was a Teigu in the form of a flamethrower. It was owned by Bols; it was destroyed after self-destructing.

Abilities
Rubicante was an offensive Teigu that created a flamethrower when activated. The flames were so intense that they could not be extinguished even by submerging oneself in water, burning until the target was killed. It gains its power from the large cylinder which acts like jet engine turbine by aerial suction and heating the air. The cylinder on it could cause a huge explosion, and could be used as a final resort as it could be set to explode by pressing a button. However, it destroys the Teigu.

Trump Card
Magma Drive (マグマドライブ, Maguma Doraibu): The trump card of Rubicante, which fired individual blasts of fire at the target, giving the Teigu longer range capabilities than usual.

Trivia

 * Rubicante is the name of one of the thirteen devils that guard the eighth circle of Hell in Inferno.
 * Rubicante's fire abilities might have been inspired by Rubicante from Final Fantasy. In this setting, Rubicante is the Elemental Archfiend of Fire.
 * The fact that Rubicante's flames were impossible to extinguish possibly alludes to the real-world usage of napalm as flamethrower fuel. Napalm is known to stick to the victim's skin with no effective ways to remove it until it burns out completely.

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Rubicante