The plot might involve the dragon seeking revenge on the Freys for some past wrong. Maybe the Freys had wronged someone the dragon was attached to, so it attacks their strongholds, burns their lands, and causes chaos among them.
In this fanfiction, perhaps the dragon attacks the Freys because it senses an evil or immoral presence within their clan. The Freys could be involved in dark magic or some heinous deeds that the dragon, being a creature of justice in a way, decides to put an end to. This could lead to a series of events where the other characters in the story either side with the dragon or try to stop it, depending on their own interests and relationships with the Freys.
The main characters could include the leaders of the Freys. They would be the ones making the decisions on how to deal with the dragon attacks. And the dragon itself, which might have unique characteristics or abilities that make it a formidable foe. Additionally, there could be a wizard or sorcerer who either tries to control the dragon or help the Freys defend against it. They would play important roles in the story as they bring different elements of power and knowledge to the situation.
In this fanfiction, perhaps Naruto could be under some sort of mind control. Maybe an enemy has found a way to manipulate him into attacking the Leaf. It could also be a case where Naruto is misled about the true nature of the Leaf Village, believing it has committed some great wrong that warrants his attack.
One possible plot could be that Kakashi is under a genjutsu. In this fanfiction, an enemy ninja might have cast a powerful genjutsu on Kakashi, making him see Naruto as a threat to the village. So, Kakashi attacks Naruto, but Naruto, being the understanding person he is, tries to break the genjutsu instead of fighting back right away.
Perhaps there's a time - travel element involved. Naruto from the future, who has been through some horrible experiences, travels back in time and, in a state of confusion or rage, attacks Kushina. Or it could be that a powerful villain has the ability to manipulate Naruto's emotions and uses that power to make him turn on his mother. This would create a very complex and dark plotline that challenges the normal Naruto narrative.
One possibility could be that Pikachu is somehow mind - controlled. Maybe a powerful and evil Pokémon or a villainous trainer uses a special device or power to make Pikachu turn on Ash. Pikachu might then use its electric attacks like Thunderbolt or Volt Tackle against Ash, leaving Ash shocked and confused as he tries to figure out what's wrong with his beloved partner.
One possible reason could be a misunderstanding. Maybe Naruto is somehow influenced by an enemy's jutsu that makes him see Minato as a threat. For example, if an enemy uses a genjutsu to distort Naruto's perception of his father.
In this kind of fanfic, perhaps Harry has finally had enough of the Dursleys' mistreatment. He might use his magic in a moment of rage. Maybe he starts by levitating Dudley to teach him a lesson after one too many taunts. Or he could use a spell to make Aunt Petunia's precious china smash, as a way of getting back at her for all the years of neglect and cruelty.
I'm not sure specifically as there could be many different versions of such a fanfiction. It might involve Tanya having some sort of conflict or aggression towards Bella in the context of the fan - created story world.
In this novel, the alien might be a lost one from its fleet. It stumbles upon the cabin where the family lives. The family initially thinks it's just a strange animal or something. But when the attacks start, they realize it's an otherworldly creature. They could barricade themselves inside the cabin at first. Then they might try to find a way to communicate with the alien. If that fails, they would have to resort to more drastic measures to protect themselves like using fire or any weapons they might have in the cabin. It would be a story of survival against an unknown and powerful enemy.
Perhaps the family has just moved into an old, haunted house. Unbeknownst to them, a tentacle monster lurks in the basement. One night, the wife goes down to the basement alone, and the monster attacks her. The story could then be about how she tries to escape and alert her family.