Maybe he's trying to hide his identity for a secret mission. In some fanfictions, Naruto might be undercover, and covering his face is a simple way to avoid being recognized.
The Joker cutting his face off is a symbolic act of completely letting go of any pretense of normalcy and embracing his insanity to the fullest. It's a shock tactic to terrorize and confuse his enemies.
Perhaps he's trying to protect himself from some kind of danger. There could be an enemy who is looking for him and by covering his face, he can avoid being detected easily. It could also be a part of a new jutsu or power he has discovered where covering his face is necessary for its activation or control.
Well, it could be that Kakashi, being a character who values the integrity of the original Naruto narrative, sees fanfiction as a deviation. Fanfiction might include out - of - character scenarios for him or the other characters. He might also dislike the fact that some fanfictions can be of very poor quality in terms of writing and plot, which could be a reason for his dislike.
Maybe he thinks fanfic often distorts the real story or characters of Naruto. In the original Naruto series, Kakashi has his own understanding and relationship with Naruto. Fanfic might create some scenarios that go against his view of Naruto or the world they live in.
It could be due to physical exertion. If he has been running or doing some intense exercise, blood rushes to the face, causing it to turn red. This is a normal physiological reaction as the body tries to cool down.
His face might get red because he is embarrassed. For example, if he makes a mistake in public or is caught in an awkward situation, blushing can be a natural reaction.
There was no character named " Yan Ruyu " in " Covering the Sky ". You might want to know about the " Void Emperor " Ji Zi. He was a character in the novel " Covering the Sky ". He was the Emperor of the Void lineage. He fought against the heavens and earth all his life and never retreated. He was known as the " Void Night Walker " along with Emperor Wu Shi, Emperor Vicious, and Duan De.
The Void Sovereign was a tragic character. He wasn't weaker than anyone in his life, but he had never truly ruled the world. In his later years, he fought against the Undying Heavenly Emperor and the other monarchs of the foreign lands and died in a bloody battle. The Void Sovereign only had one son and one daughter. The son died at the end of the Ancient Chaos Era, and the daughter was the Queen Mother of the West. She was beautiful and had a bad life, and she did not have much interaction with the Void Sovereign.
While waiting for the TV series, you can also click on the link below to read the original work of " Little Fox Demon Matchmaker " to understand the plot in advance!