It's hard to say exactly. But it might involve characters from both universes in some sort of romantic or sexual situation that is not part of the original stories. For example, a demigod from Percy Jackson's world could be in a relationship with a character from Game of Thrones, and the 'lemon' aspect would add a more adult - themed element to their interactions. However, this is just speculation and not based on an actual existing fanfiction (since we don't know if there is one for sure).
I'm not sure if there is an exact fanfiction that combines all those elements. Fanfiction can cover a vast range of themes and crossovers, but a 'lemon' aspect (which often implies sexual content) might be less common in more mainstream - or at least more publicly shared - fan works. It's possible that it exists in some corner of the internet, but it would be hard to find given the potential mature nature.
One interesting crossover could be the demigods from Percy Jackson finding themselves in the world of Westeros. Maybe Percy uses his water - controlling abilities to help during a drought in a Westerosi kingdom. Another could be the Stark children having some sort of connection to the Greek gods, like Arya being blessed by Athena for her stealth and intelligence.
It's likely that Percy Jackson himself would be very powerful. His ability to control water gives him a huge advantage, especially in a world like Westeros where there are many bodies of water. He could drown his enemies or use water to deflect attacks. However, Daenerys with her dragons would also be a formidable opponent. Her dragons could breathe fire and fly, which is hard to combat.
The Percy Jackson series was a series of fantasy novels written by Douglas Hofstadter, who told the story of the protagonist, Percy Jackson, and his adventures. The series included Defense Against the Dark Arts, The Magic Kingdom, Percy Jackson and the Sword of Fire, and Percy Jackson and the Curse of the Dragon.
The protagonist of the story, Percy Jackson, was a young magician who had a special ability--to communicate with dragons. In the series, Percy Jackson and his companions went on many adventures, their goal was to find lost magical treasures and fight against evil forces.
The plot of the series was full of fantasy elements and magic techniques, which was very popular among readers. At the same time, the characters in the novel also have their own characteristics, with profound character images and character descriptions, so that readers can understand and appreciate the story more deeply.
One potential antagonist could be a jealous player within the game. This player might see Kate as a threat to their own status or progress in the game and try to sabotage her at every turn. Another could be a rogue AI or a corrupted code within the game system itself that has developed a self - aware malevolence. It could target Kate specifically because she has some unique ability or item in the game. A third potential antagonist could be a character from the Percy Jackson mythos who has somehow entered the game world and wants to use it for their own dark purposes, seeing Kate as an obstacle to their plans.
Game of Thrones was an eight-book American fantasy novel series by George R. R. Martin. The story takes place in the fictional world of Westeros and tells of the political struggles and wars between the seven kingdoms, as well as the complex relationships between the various families.
The protagonists of the story were the leaders of the various families, who were fighting for the right to rule the continent of Westeros on this stage full of power struggles. The most famous were the Starks, Lannisters, Baratheons, Tyrells, and Dragonstone.
The story was very complicated, including many dramatic twists and conflicts such as civil war between families, invasion of foreign ghosts, and various political conspiracies and betrayals. The entire series was full of thrills, complex interpersonal relationships, and profound philosophical thinking.
The final ending of Game of Thrones was an open-ended story where readers could fill in the gaps in the story based on their own imaginations and guesses.