Well, he could be a character who has been reimagined. Jon Arryn in the original series was an important figure. In this fanfic, the 'Brightflame' addition might suggest some sort of connection to a more flamboyant or perhaps magically - inclined lineage. It's possible that he has abilities or a backstory that ties him to this 'Brightflame' concept, which could make him a key player in the fanfic's plot, different from his role in the original story.
The concept of heir in a 'Game of Thrones' fanfic involving Jon Arryn and Brightflame is highly variable. There are so many factors at play. The world of 'Game of Thrones' is full of complex family trees and political relationships. It's possible that an heir could emerge from a previously unthought - of branch of the family. Maybe there's a secret marriage in the past that ties a character to both Jon Arryn and Brightflame in a way that gives them a legitimate claim to be the heir. And then there are the power - hungry lords and ladies who might try to manipulate the situation to their advantage, putting forward their own candidates as the heir, whether they have a real claim or not.
He could be a central figure driving the plot. For example, if his 'Brightflame' aspect gives him some special power, he might be using it to influence the political or magical landscape in the fanfic's version of Westeros.
Well, if Jon Arryn married a Targaryen in a fanfic, it could completely change the power dynamics in Westeros. For one, it might strengthen the position of House Arryn, as the Targaryens have a powerful lineage. This union could potentially lead to different alliances. Maybe they would have had children who could have been claimants to the Iron Throne, adding more chaos to the already complex web of power struggles. Also, it could change the relationship between the Vale and other regions. The Vale might become more involved in Targaryen - related matters, like the fight for the throne or the conflict with the other Great Houses.
She could be very proud, as is common in the Targaryen bloodline. Given the Targaryens' history of dragon - riding and ruling, she would likely have a sense of entitlement. Maybe she's also highly intelligent, using her wits to help Jon Arryn in his political maneuvers.
One popular fanfic in this vein is 'The Arryn - Targaryen Alliance'. It delves into the political implications of such a union. The story weaves a complex web of court intrigue as Jon Arryn's Targaryen wife tries to navigate the power - hungry world of Westeros. It's well - written and has some great character development.
The Stark family might be cautious. They have always been about honor and loyalty. This new union could make them question the motives of House Arryn. They might see it as a power - hungry move. The Lannisters would probably be threatened. They are always looking to increase their own power, and this unexpected alliance between the Arryn and the Targaryens would be a thorn in their side. The Baratheons, who had their own claim to the throne, would be enraged. They would see it as an attempt to undermine their rightful claim and would likely start plotting against this new alliance.
Jon Arryn could be a guiding figure for the heir. If the heir is someone from the Vale or has a connection to Jon Arryn's legacy, he might be seen as a sort of mentor from the past. In relation to Brightflame, perhaps he knew some secret about Brightflame that could impact who the heir is in the fanfic.
In this 'Arryn Another Claimant' Game of Thrones fanfiction, Arryn could potentially be a new character created by the author. Maybe Arryn is someone who believes they have a legitimate claim to the Iron Throne, perhaps related to an old and forgotten branch of a noble house in Westeros. Without reading the fanfiction in detail, it's hard to say exactly who this Arryn is, but it's likely they will play a significant role in the power struggles and political intrigue that are hallmarks of Game of Thrones stories.
One great 'Game of Thrones' Arryn fanfiction is 'The Arryn's Ascent'. It delves into the life of an Arryn character in a way that feels very true to the complex world of Westeros. The author does an excellent job of portraying the political intrigue and personal struggles that an Arryn might face.