Infernal

The is a  victim, affected by the Human Body Ignition Phenomenon. The Flame Humans have no reason and rampage until their lives flicker out. They are capable of launching fireballs and get a notable boost in power and speed, and have more than one appearance, though they all form around a black figure enveloped in fire. Flame Humans have also shown the ability to absorb surrounding flames and using it either for offense or defense. The only known way to kill a Flame Human is to impale their core, located in their chest, which is a painless method of returning them to the raging flames. Humans also tend to pray for the souls of the defeated Flame Humans, as a way of purification.

Victims

 * Mikako's mother fell victim to the phenomena in year 196.
 * A man riding a train, completely transformed into a flame human and set fire to the train carriage. He was later killed by Akitaru Ōbi.
 * Saeko fully transformed into a flame human, resulting in the woman damaging her husband's workplace and killing an employee. She was killed by Shinra Kusakabe.
 * Mikako's father partially transformed into a flame human while remaining conscious through the ordeal. He was soon killed by Arthur Boyle without any resistance.