Perhaps the house gardener is an undercover spy. He uses his role as a gardener to move around different houses undetected. He could be passing on information about the layout of the castles, including secret passages and store rooms, which could be crucial in a siege or an assassination attempt. All the while, he has to maintain his guise as a simple gardener who is only interested in tending to the plants.
A house gardener could fit in as a keeper of secrets. The gardens often have hidden corners and old trees that could hide things. He might stumble upon a hidden cache of weapons or a secret meeting place. His presence is often overlooked as he is just a gardener, so he can observe a lot without being suspected.
One possible plot could be that the Reynes return with a newfound power. Maybe they have allied with some mysterious group during their absence. They could come back to claim their old lands and seek revenge on those who wronged them in the past. Their return might also stir up the political situation in Westeros, causing new alliances and rivalries to form.
One idea for a new house in a 'Game of Thrones' fanfiction could be House Frostwood. They could be from a far northern region, beyond the Wall. Their sigil could be a white wolf on a blue field, symbolizing their connection to the harsh, cold environment and the wild wolves that roam there. Their motto might be 'In Ice, We Endure'.
One possible plot could be Merlin, with his magic, finding himself in the world of Game of Thrones. He might use his powers to try and influence the power struggles. For example, he could help Daenerys control her dragons better or assist Jon Snow in his fight against the White Walkers. Maybe he would be seen as a sorcerer from a far - off land and have to prove himself to the different factions in Westeros.
Well, it could be about Naruto characters in the world of Game of Thrones with godlike powers. Maybe Naruto has the power to control the dragons like Dany, and he uses his ninja skills to fight in the Westeros battles. For example, he could use his shadow clone jutsu to confuse his enemies during a siege.
It could be about a character finding solace and protection in the king's arms. Maybe a love story between a commoner and the king, defying the odds and social hierarchies in the brutal world of Game of Thrones.
Well, it could be about some traitors in the Game of Thrones world who are trying to escape from a powerful enemy. Maybe they are fleeing from a vengeful lord or a powerful magic user. They might have to use their wits and whatever resources they have to get away, like finding secret passages or forging alliances with unexpected groups.
In a 'Game of Thrones Epilogue Fanfiction', it could be about the adventures of the next generation. The children of the main characters might discover new threats or mysteries. For instance, they could find hidden secrets about the White Walkers that were not fully explored in the original series, leading to a new quest.
One possible plot could be that Hermione, with her intelligence and magical skills from the Harry Potter universe, is transported to the world of Game of Thrones. She meets Jamie there. Maybe she tries to use her knowledge to prevent some of the bloodshed in Westeros. She could team up with Jamie, who has his own complex history and skills with a sword. Together they might try to bring about a more peaceful solution among the warring houses.
It could be about the last dragon in Westeros rising to power. Maybe it forms a bond with a new character who tries to use its strength to claim the Iron Throne. This person might face many challenges from the remaining great houses who don't want a dragon - backed ruler.