In the Wugengji, the reason why the generals of the Dark Clan wore iron masks in their death eyes was to protect the Underworld from foreign invasion. In the setting of the story, the Underworld was a peaceful universe country, but it was also threatened by other races. As one of the generals of the Underworld, Death Gaze's duty was to protect the Underworld from foreign invaders and maintain the peace of the universe. However, since the Underworld was strong enough, Death Gaze no longer relied on the iron mask to protect himself. In the story, the iron mask was a weapon that Death Gaze and the other Dark Tribe generals wore together. It symbolized the glory and protection of the Underworld. When the Underworld is threatened, Death's Gaze will pick up the iron mask and fight with other generals to protect the Underworld from foreign invaders.
In the Wugengji, the reason why the people of the Dark Tribe all had Petrification was because of a substance called " Petrifying Oxen " in the blood of the Dark Tribe. This substance could catalyze the blood to coagulate, allowing the Elysium clansmen's bodies to remain solid for a long time. However, this petrifying reagent was limited to a certain extent. When its concentration reached a certain level, the Dark Clan's bodies would also begin to show signs of petrification. Therefore, the Dark Clan would maintain the same form for a long time to avoid petrification.
Maybe it's to hide his identity or for some sort of protection.
Maybe it's for protection from something, like dust or germs.
Perhaps Mang took off his mask to communicate more clearly without any obstruction, or maybe he was following someone's instruction to do so.
It could be for a more personal reason. Maybe he's going through some internal struggle or self - doubt, and wearing a mask is a way for him to create a new persona, a stronger and more confident version of himself. It's like a shield that allows him to face challenges he might not be able to as the regular Naruto.
Maybe it's for a unique style or to stand out. It could be part of the character's design.
Bane wears a mask to control the pain and enhance his strength. It's a key part of his character's identity.
Perhaps the mask is just a fashion choice or it might be related to a specific story or event in the BT21 storyline that gives a reason for Mang to wear it.
His identity is still a mystery, but as I said before, some believe he was an illegitimate half - brother of King Louis XIV.
In the man in the iron mask story, the iron mask is extremely significant. It was used to completely conceal the man's features. This was crucial as it was likely related to protecting the identity of the person for political or personal reasons. Maybe the person had a face that could be recognized by others and that recognition would lead to some sort of upheaval. So, the iron mask served as a tool for anonymity. It also made the man a figure of great mystery, which has fascinated people for centuries, and it has inspired countless works of literature and art, all centered around this mysterious masked figure.