This chapters further highlight how Miyoi Okunoda is not a regular Zashiki-Warashi but actually one more Youkai-Like than them, ,since she is also sharing aspects with Suima Youkai, but still trying to live&blend in the Human Village as a Normal Human ( like Sekibanki).
It also shows how the Normal Human Villagers have a limited view about how " Youkai-Human Balance " works in Gensokyo ( ref. " Forbidden Scrollery Manga ") while it is hinted that "The Secret History Association" have morei insights but they are dangerously biased towards Humans to the point of Scheming Revolt,Persecution andUsurpation
Lastly,let us not forget that a " Human Settled as a Human in Gensokyo" still has safe&sound choices to turn Half-Youkai or Shikaisen or Hermit or Human Magician or akin to them,as long as not Full-Youkai.
Moreover if one is a " Human Settled in a Youkai-like way" ,it is still safe&sound to turn into a Full-Youkai as long as one does not down the Evil Route of the "Youkai(-turned) Fortune Teller" ( "Forbidden Scrollery Manga ) .
Specifically he was that Human Villager who was a Fortune Teller Student at the Human Village but set up a dreadful scheme (starting with his own suicide which caused quite a stir in the Human Village) where he willingly turned into an Evil Spirit-like Youkai ( a Youkai born out of a Human willingly taking procedures of turning into an Evil Spirit who kept resisting the Negative Grudge) after he tricked&stealth-possessed Kosuzu.
In the end all it took was a "Non-Danmaku Hakurei Talisman " by Reimu to Truly Exterminate him since he was Irredeemably Evil(not to mention dangerously misunderstanding the Role of the Hakurei Shrine,its Shrine Maiden and the Gensokyo Balance Overall ) ,as opposed to the " Youkai Fox Student " ( in the same " Forbidden Scrollery Manga ") who "without evil intentions" silently&harmlessly broke through tens of them interwoven by Reimu in a blocking panel at the Temple school.