Third Generation

The are a group of individuals that have adapted to the Spontaneous Human Combustion, and instead of becoming an Infernal, they awakened the ability to generate their own flames via a body part or object,  although they cannot manipulate already existing flames unlike Second Generations. Because of their unique abilities, such as immunity to burning, Third Generations usually become Fire Officers in the Special Fire Force. As with the Second Generation, they sport higher physical capabilities as well as being more resilient to damage, along with natural immunity to flames.

Ignition Ability
An is an ability granted to Third Generations. This ability allows the user to generate flames from certain body parts, such as their tongue, fist, or leg, and the ability can be combined with specific types of objects like sword hilts or bubblegum.

Weaknesses
Though gifted with the power of igniting flames, this ability also comes with some drawbacks. If the ability is overused, the user can use so much oxygen that they'll no longer be able to use their Ignition Abilities until they've regathered more. Repetitive use of the ability under such oxygen-deprived conditions could lead to the body beginning to char, and the user can gain a lung disease from it.

Trivia

 * In the anime, when Third Generation users activate their pyrokinesis, their eyes glow.