I recommend 'Robb Stark: The Lost Legacy'. This fanfiction focuses on an alternate timeline where Robb survives. It's interesting as it explores how he would have changed the course of the story. It has some great character development and interactions with other key characters from the series.
The relationship between Robb and Talisa in fanfiction can also be a source of great emotional drama. Their love could be tested by war, betrayal, and family obligations. Fanwriters might write about their private moments of joy and sorrow, how they comforted each other during difficult times, and how their love endured or, in some cases, tragically ended.
One possible plot could be that Robb Stark manages to avoid the Red Wedding trap. Maybe he receives a tip - off from an unexpected source, like a disgruntled Frey servant. With this knowledge, he could turn the tables on his enemies. He might use his military strategy skills to ambush the Freys instead, and this could lead to a major shift in the power dynamics in the North, with Robb emerging as an even stronger leader.
Another reason is that Robb Stark's story ended tragically in the original series. Fans are drawn to fanfiction as a way to rewrite his story, give him a better ending, or just see different interpretations of his character. It allows for a lot of creativity and speculation among fans.
One great 'Game of Thrones Robb Stark OC fanfiction' is 'The Stark Heir'. It follows an original character who becomes an important ally to Robb Stark. The story has great character development and exciting battle scenes.
Arya Stark is one of the most beloved characters from 'Game of Thrones'. She is initially presented as a bit of a tomboy, not conforming to the ladylike standards of her society. As the story progresses, she becomes a key player in the power struggles of Westeros. She is brave, resourceful and has a very distinct personality that makes her stand out among the many characters in the series.
Robb Stark would likely become more cautious. After narrowly escaping death at the Red Wedding, he would know that his enemies are ruthless. This would make him more calculating in his military campaigns and political moves. He might be less trusting, especially of those who have shown signs of betrayal in the past.
Arya is often paired with Robb. They have a strong bond as siblings, and in fanfiction, they might team up to take revenge on their enemies or work together to restore the Stark family's honor. Arya's skills as an assassin could be very useful in Robb's campaigns.
It could change it a great deal. In the original story, Robb's actions regarding the Freys led to the Red Wedding. But if he married a Frey, it would mean no Red Wedding. This would keep Robb alive and his army intact. It could also change the power dynamics in Westeros as the Stark - Frey alliance would be very strong.
First, do your research on Robb Stark's character. Know his traits, his goals, and his relationships in the original series. Then, create your original character with a clear backstory, personality, and motivation. Make sure the OC's story can fit into the world of Game of Thrones. For example, if your OC is a warrior, think about where they learned their skills and why they would side with Robb Stark.