Perhaps in a 'rhaenyra gagged fanfic', the plot could revolve around a political intrigue. Rhaenyra is gagged by those who oppose her claim to the throne. This forces her to find alternative ways to communicate with her allies. She could use gestures, or write secret messages. It could also show her inner strength as she endures this difficult situation and still manages to fight for her rightful place.
Well, it could be that Rhaenyra is gagged during a hostage situation. Her captors use this to keep her from shouting for help or ordering her troops. The fanfic could then focus on how she tries to outwit her captors. She might use her knowledge of the surrounding area to create distractions or find a way to free herself and turn the tables on those who have wronged her.
Obviously, Rhaenyra herself would be the central character. Then there could be her captors or those who gag her. If it's a political story, her rivals for the throne like Alicent or her supporters could be involved. Her loyal guards or servants might also play a role. They could be trying to rescue her or help her communicate while she is gagged.
One possible plot could be a story of a rescue mission. Blair is in a dangerous situation, bound, tied and gagged. The protagonist discovers Blair's plight and has to overcome various obstacles to free Blair, all while being chased by the villains who put Blair in that state.
One idea could be a fanfic where Aemond and Rhaenyra are forced to work together to save the realm from a common enemy. They start off distrusting each other but gradually come to respect one another's skills and viewpoints.
One idea could be a mystery plot where Castiel is tied up and gagged by an unknown force. His friends have to search for him and figure out who did it. For example, Sam and Dean could follow a series of clues that lead them to different supernatural creatures until they finally find Castiel.
In a more comical fanfiction, Tony could be tape - gagged by a new agent who mistakes him for an intruder. The rest of the team then has to deal with the chaos that ensues as they try to figure out what happened and why the new agent took such drastic action. Tony, of course, is frustrated and can't wait to get the gag off and give the new agent a piece of his mind.
One possible plot could be that Rhaenyra takes on the role of a strict but loving mentor. She teaches her siblings about the ways of the court, how to handle political intrigue. For example, she might train them in the art of diplomacy, like how to make alliances and avoid conflicts. This would help them grow into strong and capable members of the family, ready to face any challenges that come their way.
In this fanfiction, it could be that Rhaenyra adopts her siblings as a way to show her power and benevolence. She wants to prove that she can be a great leader not just in ruling the kingdom but also in taking care of her family. She might give her siblings important roles within her court, and they in turn support her in her political endeavors.
One possible plot twist could be that the Stark she marries has a secret power or ability. Maybe he can communicate with animals like some Starks in the lore. This would add an interesting dynamic to their relationship as Rhaenyra comes from a different world in terms of magic and abilities. It could also lead to political intrigue as other houses might be jealous or fearful of this union and the new powers it could bring.
One possible plot could be that the two lovers are in a dangerous situation where they are bound and gagged by some villains. But their love for each other gives them the strength to endure and eventually find a way to escape and be together.
It might be a horror - themed story. The girl is tied and gagged, perhaps by some deranged person. The treadmill could be part of a sadistic plan, like she is forced to be near it for some psychological torture. The story could then be about her struggle to escape this terrifying situation.