It's possible. In the realm of fanfic, the boundaries are very loose. The Happy Mask Salesman could be written as a new character in a Harry Potter fanfic. He could be involved in a plot where his masks play a crucial role, like a mask that can disguise a wizard as a Muggle or vice versa, adding an interesting twist to the story.
He could be a purveyor of enchanted masks that give special abilities. For example, a mask that allows the wearer to speak Parseltongue even if they're not a Slytherin.
There might be. Naruto fanfic is a vast genre where writers like to experiment. The Happy Mask Salesman has a rather strange and captivating persona. Some fanfic authors may see the potential in bringing him into the Naruto universe to create new plotlines, perhaps involving strange masks with unique powers in the world of ninjas.
If you're part of a Legend of Zelda fan community, either in - person or online, asking around there is a good idea. Fellow fans might know of some hidden gems of fanfics that involve the Happy Mask Salesman and the reader. They could have personal recommendations based on their own reading experiences.
A good fanfic in this case would have a well - developed character for the reader. It should give the reader a distinct personality and role in the story. For example, the reader could be an adventurer who stumbles upon the Happy Mask Salesman in their travels.
The Happy Mask Salesman might be a mysterious figure who shows up in key moments. He could be a sort of catalyst for certain events. Maybe he gives a mask to a young Naruto that unlocks a hidden power within him, but at the same time, comes with a dangerous price or curse that Naruto has to figure out how to deal with. This would add a whole new layer of complexity to Naruto's journey.
He could wear a mask to protect his loved ones. If there's a new threat in the wizarding world that targets him and those close to him, a mask would be a way to keep his identity hidden so that his enemies can't use his friends and family against him.
Often, Harry, Hermione, and Ron are still main characters in 'Harry Potter Mask Fanfic'. They might be the ones to discover the mask and its powers. Neville could also be a main character, perhaps using the mask to gain confidence and show his true potential. And sometimes, even Draco Malfoy could be involved if the mask has something to do with the Slytherin side of the wizarding world.
One interesting 'Harry Potter Mask Fanfic' could be about a magical mask that gives the wearer the ability to transform into a different Hogwarts house founder. For example, a Gryffindor student finds a mask and suddenly has the wisdom of Ravenclaw. Another could involve a mask that has the power to hide one's identity from the Dark Mark detectors. It would add an exciting layer of mystery and adventure to the Harry Potter universe.
One great Snape fanfic involving a Harry Potter mask could be 'The Masked Encounter'. In this fic, Snape discovers a strange mask that has the appearance of Harry Potter. It leads to some really interesting interactions and a deeper exploration of Snape's character. He is forced to confront his complex feelings towards Harry in a very unique way because of this mask.
One possibility could be that Harry wears a mask to hide his identity while on a secret mission for the Order of the Phoenix. Maybe he's infiltrating a Death Eater gathering and the mask helps him blend in without being recognized as the famous Boy Who Lived.