I'm not sure specifically which '9 - year - old therian shot by grandfather' story you're referring to. There could be many tragic incidents like this. It might be a very local or specific news story that hasn't reached wide public knowledge.
Another possibility is that Naruto wears the mask as a tribute to Kakashi after a significant event. It could be that Kakashi sacrifices himself to save Naruto and the village. So, Naruto dons the mask to carry on Kakashi's legacy and to always remember the lessons he learned from him.
There could be many reasons behind such a tragic event. Maybe there was a misunderstanding, or some underlying family issues. However, without more information, it's hard to tell the exact full story. It's a very sad situation and proper investigations should be carried out to find out the truth.
One idea could be a fanfic where Naruto's face mask becomes a magical item. Maybe it has the power to hide his presence completely from enemies, leading to some really cool stealth missions.
One idea could be a story where Mask and Bobble go on an adventure together in a magical forest. They encounter strange creatures and have to work together to find their way out.
Perhaps a fanfiction could show Batman's vulnerability behind the mask. He's often seen as this invincible figure, but in reality, he's just a man. The mask could be a symbol of his isolation, and a story could be crafted where he starts to break down those walls he's built around himself while wearing the mask, maybe through an unexpected friendship or encounter.
A story could revolve around an Anbu agent who loses his mask during a mission. As he tries to retrieve it, he has to face his own identity without the mask's anonymity. It could explore how the mask is not just a tool for concealment but also a part of his psychological armor.
One idea could be that Naruto, as the son of Black Mask, has to struggle with his father's evil reputation while trying to prove himself in the Young Justice world. He might use his ninja skills in unique ways within the context of the Young Justice team's missions.
A great idea for 'Man in the Iron Mask' fanfiction would be to focus on the relationships within the prison. How did the guards interact with the man in the iron mask? What if there was a sympathetic guard who secretly helped him? You could also introduce other prisoners who befriend the man in the iron mask and together they plan an elaborate escape. This would add more depth to the story and show different perspectives within the prison walls.
One idea could be that the gas mask is a powerful artifact that gives the wearer special abilities in the Naruto universe. For example, it could enhance a ninja's chakra control or allow them to breathe in poisonous environments. Another plot could involve a character who discovers a hidden meaning or power within the gas mask that has been long forgotten in the ninja world. It could also be part of a mystery where the origin of the gas mask is tied to an ancient clan or a powerful jutsu.