Yes, there are likely several fanfics out there with that premise. The idea of Ayra Stark being the one to take down the Night King was a popular theory among 'Game of Thrones' fans even before the show's final season. Fanfic writers often explore such alternate scenarios, giving more depth and different storylines to characters like Ayra in relation to major events like the defeat of the Night King.
Well, it could be an interesting concept. Naruto has his own set of powerful abilities like the Rasengan and his ninja skills. The Night King from 'Game of Thrones' is a formidable undead foe. If Naruto were to enter the 'Game of Thrones' universe, his speed and combat skills might give him an edge against the Night King. However, it also depends on how the writer would handle the magic systems of both worlds colliding.
I'm not entirely sure if there is a specific 'Harry Potter kills the Night King' fanfiction. However, given the popularity of both 'Harry Potter' and 'Game of Thrones', it's very likely that some fans have been creative enough to write such a story. Fanfiction communities are full of these kinds of crossovers, but you may need to search through various fanfiction platforms to find it.
A good fanfic would have strong character development for Ayra. It should show her growth from a normal girl to a powerful assassin capable of taking on the Night King. For example, her skills in combat and stealth should be well - described and progress throughout the story.
Well, Harry Potter would likely use his powerful magic. He might use the Avada Kedavra curse to kill the Night King. Then, the magical world of 'Harry Potter' would be intertwined with the world of 'Game of Thrones'. Maybe the wizards would then have to deal with the aftermath in Westeros, like helping to rebuild or dealing with the power vacuum left by the Night King's death.
One possible plot could be that Ayra has a premonition about the Night King's plans. She then sets out on a solo mission to stop him. Along the way, she meets some old friends or makes new allies who help her get to the Night King. When she finally faces him, she uses her unique fighting style, a combination of her Faceless Men training and her Stark roots, to take him down. After that, she has to deal with the power vacuum left by the Night King's death and the political implications within Westeros.
One consequence could be that he becomes a hero among his peers. Everyone in Hogwarts might look up to him even more. The other students could see him as a real dragon - slayer, which gives him more popularity and respect.
" The Legend of the Dragon King on Douluo Continent III " was a popular fantasy novel written by the Third Young Master of the Tang Family and published on Qidian Chinese website. The story narrated the legend of the Dragon King on the Douluo Continent. It involved the battle between the peerless genius and the Dragon King. The reader can read or listen to this novel on the Qidian Reading App. The recommended audio book host is Xidao Gongzi. His performance makes people feel like they are there, but the sound effects still need to be improved. You can also get the benefits of an experience member if you go to Qidian to listen to books! On the Qidian Reading App, readers could read authentic books and listen to authentic audio. The male lead was Tang Wulin, a black-bellied but loyal child while the female lead was Gu Yuena. She was cold, wise, and possessed powerful abilities.
Yes, there are likely fanfics out there with that plot. Fanfic writers often explore unique and creative scenarios like Harry killing a dragon. You can try searching on fanfic platforms such as Archive of Our Own or Fanfiction.net to find such stories.