Who could be the main antagonist in 'hiccup hides his strength fanfiction'?

One possible plot could be that Hiccup hides his strength to protect his village in a more unexpected way. For example, he pretends to be weak while secretly training a special group of dragons to be a surprise defense force.

It could be a new character. Maybe a powerful ninja from a far - off land who has heard rumors of Naruto's strength and is determined to draw it out and defeat him to prove his own superiority. This antagonist might be secretly spying on Naruto and trying to find ways to force him to show his true power.

It could be someone who is jealous of Naruto's hidden genius. Maybe a fellow ninja who senses that Naruto is hiding something and wants to expose him out of envy. This person might try to undermine Naruto at every turn.

A powerful dragon rider from a far - off land who has a grudge against the Berk tribe (Hiccup's tribe) could be the main antagonist. He or she sees Hiccup and Heather's marriage as a symbol of the growing strength of Berk and decides to target them specifically to weaken the tribe. They might try to steal their dragons or spread false rumors about their marriage to create unrest among the people.

It could be a dragon hunter who sees Hiccup in his dragon form and wants to capture him for study or to use his unique abilities for evil purposes.

A rogue dragon rider who has different ideas about how to treat dragons. He might see them as tools for power rather than friends like Hiccup does. This rider could be causing trouble for Hiccup and his tribe by stealing dragons or using them to attack other tribes.

Perhaps a group of rogue Hogwarts students who have fallen under the influence of dark magic. They want to use Harry for some dark ritual, and Snape becomes an unexpected shield for Harry. Snape has to deal with the internal problem of the school while also protecting Harry from these students.

The main antagonist could be a rogue ninja who also has some form of super strength and wants to prove that he is stronger than Naruto. They could have several epic battles throughout the fanfiction.

Maybe a jealous rival from within the village. This person has always been envious of Hiccup's relationship with Toothless and his status as a dragon trainer. When Hiccup gets struck by lightning, this rival spreads rumors that Hiccup is now cursed and should be ostracized. He tries to turn the villagers against Hiccup in order to take his place as the leading figure when it comes to dragons in the village.

Maybe a rival Viking tribe that has a different view on dragons. They see dragons as a threat rather than friends like Hiccup and Valka do. So they try to disrupt the peace that Hiccup and Valka are trying to build between the Vikings and the dragons. They could be constantly causing trouble, stealing dragon eggs or attacking dragons, which would force Hiccup and Valka to take action against them.