Well, it's quite possible. Given the vast world of fanfiction, writers often come up with very strange and wonderful ideas. The idea of Naruto being a djinn could lead to some really interesting plotlines. However, I'm not sure if there are a lot of such fanfictions. You'd have to do a proper search on the major fanfiction platforms.
Perhaps Naruto is a djinn as a result of some ancient curse or blessing. His djinn abilities might include things like granting wishes in a unique Naruto - style way. The plot could revolve around Naruto trying to balance his normal ninja life with his new djinn responsibilities. He might have to face off against other djinn - like beings who have different ideas about how to use their powers, and he has to protect the world from their misdeeds.
Fairy Ivan was an elf in Pokémon. She was an evolved version of Ivan. Its characteristic was its charming body. It would release waves that could eliminate hostility from its bowknot-like antennae and calm disputes. Fairy Ivan's appearance was mainly white, and the top of her head, ears, tail, and lower half of her legs were pink. Its tentacles could wrap around the person in question and make the scene calm down in an instant. Fairy Ivan would shake her antennae in battle to confuse the opponent, and then release waves that weakened hostility. It would also wrap its antennae around the trainer's arm and walk together. Fairy Ivan appeared in games such as Pokémon X and Y, Pokémon Omega Ruby Alpha Sapphire, and Pokémon Sun and Moon.
Yes, it could be. In the vast world of fanfiction, unique crossovers like this can gain a following. Combining the magical world of Harry Potter with djinn, which are often associated with magic in their own right, can create very interesting and creative storylines that attract readers who enjoy exploring new takes on familiar characters and concepts.
One great Magi Djinn OC fanfiction could be about a new OC's journey to find a powerful Djinn. It might involve the character facing various challenges and making unexpected alliances along the way.
One common theme could be power acquisition. Since there's a djinn equip involved, the oc might be on a journey to gain more power. Another theme could be the relationship between the oc and baal, whether it's a friendship, mentorship or something more complex.
Ms. Marvel isn't a Djinn. Her abilities and background are distinct from those of a Djinn. She gains her powers through other means and has a separate comic narrative.
In the comics, Ms. Marvel is not a djinn. Her powers and background are distinct from those of a djinn. She has abilities related to energy manipulation and flight, for example.
A djinn graphic novel could potentially revolve around the traditional characteristics of djinns from Middle Eastern folklore. It may tell tales of how they grant wishes, the consequences of those wishes, and the moral lessons within. For example, it could show a character who makes a hasty wish to a djinn and then has to face unforeseen problems as a result. It might also explore the nature of djinns, whether they are benevolent or malevolent, and how they exist in a world that is both magical and mundane.