The ninjas of "Nubatama" are said to have worked behind the scenes during the many revolts and revolutions in the history of the Empire. In that long history, "Gounrakan" has become famous as a yōjutsukai (demonic arts user) with power over flame.
An outstanding ninja with a tough body and a mind that isn't distorted even in wars, he is one of the few who has left their names in the ostensible history with their strength. His flame is not physical, but an illusional flame that attacks the mind. Even Flame Dragons who can exhale flames themselves are defenseless against the flame which conflagrates the mind---it is said that all brave warriors who could not recognize this truth were sent to the netherworld.