Yukkuri and Yukkuri Aura
Many personal setting and theories straying from the common yukkuri story.
The story frame is about extermination workers doing their job and killed a Dosu. But it's all just a story to tell the author's theories.
Back in the days, Extermination workers have to rely on the instinctive "Take it easy!" response to locate and hunt down yukkuri. But lately there are individuals who doesn't answer back when called.
Factory then discovered the Yukkuri Aura. Usually, this aura is known to be released by Dosu and could affect both yukkuri and human.
But normal yukkuri also release this aura in small amount. The Yukkuri Detector detect this aura to pinpoint the location of yukkuri.
Later, the Factory also discovered from among their hundreds of yukkuri, two types of yukkuri aura. Niceheads gave out the "Easy Yukkuri's aura" while Shitheads gave out the "Uneasy Yukkuri's aura".
Marisa type has the ability to absorb these yukkuri aura and after passing a threshold, will start changing into a Dosu.
Dosu will still absorb yukkuri aura from around. The excess of this aura will then transform into magic mushroom they use to start Dosu Spark.
Dosu who absorb many Easy Aura will become strong. In contrary, Dosu who absorb many Uneasy Aura will be weak, with Spark even weaker than camera flash.
These very weak yukkuri is later also known as Fake Dosu. Their ability is higher than normal Marisa, but lower than the real Dosu.
Lately Fake Dosu has became more common. It's thought that in the past, there's more nice yukkuri so strong Dosu is possible. But these days, there's more scum yukkuri that created such Fake Dosu.
By the way, nice yukkuri here is not from human point of view, but from yukkuri point of view. These are yukkuri who are nice to other yukkuri.
For this reason, Dosu is not guardian of yukkuri, they are guardian of easy yukkuri.