Daenerys Targaryen is often paired with Jon Snow in these fanfictions. Their connection in the original series, along with their both being strong leaders, makes for an interesting dynamic. They could rule Westeros together in a new era of peace and prosperity after Jon's rebirth.
Arya Stark might interact with him. She has her own set of skills and goals. Their reunion could be emotional, and they could work together to take revenge on those who wronged their family.
In some 'jon snow reborn fanfiction', an interesting plot could be that Jon Snow is reborn with newfound powers. For example, he might be able to control the elements, which he uses to defend the North from new threats that are even more powerful than the White Walkers. He could also have a deeper connection with the Old Gods, allowing him to communicate with them more directly and gain their wisdom for leading the people.
Obviously, Jon Snow as a reborn dragon is the main character. But there could also be characters like Daenerys who might play an important role. She has her own connection with dragons, so her reaction to Jon's new form could be a significant part of the story.
One possibility could be that he would bring his magical skills into the world of Westeros. He might use magic secretly to gain an edge in battles, like creating distractions or protecting himself and his allies. For example, he could use a shielding charm during a skirmish with the wildlings.
In the 'Jon Snow Reborn as Dragon fanfic', an exciting plot might be his journey to discover the true nature of his rebirth. Is it a gift from a long - forgotten god? Or is it a result of some ancient magic that was accidentally unleashed? Along the way, he could meet characters who have knowledge about dragons and his situation, leading to a series of revelations that change his understanding of himself and the world.
Jon Snow could potentially have allies like the Mormonts. They have always been loyal to the Starks. Maybe even some of the Dornish houses might side with him. They have their own reasons to oppose the current power structure in Westeros. And of course, his friends from the Night's Watch who left with him or believe in his cause could be his allies in this conquest. He might also gain the support of some of the maesters who see the value in his leadership for the future of Westeros.
Perhaps he will discover new powers or abilities in this rebirth. In the 'Dance of Dragons' setting, there could be magic or ancient knowledge that he taps into, which changes the course of the power struggle. For example, he might be able to control dragons, which would be a huge game - changer. He could use this new power to broker peace or topple unjust rulers.
Daenerys Targaryen could be one to help. Since she has experience with dragons, she could give Jon Snow advice on how to care for the egg and hatch it.