She could pretend to be sick or injured. This might make the kidnappers lower their guard as they deal with the situation. Then she could find a chance to escape when they are distracted.
One possible plot development could be the girl's attempts to escape. She might look for weaknesses in the kidnappers' routine or the place where she is held. For example, she could notice that one of the kidnappers is more lenient during a certain time of the day and try to manipulate that to her advantage.
The plot twists. A good fanfic in this genre will have unexpected plot twists. Maybe the captor has a hidden agenda that Hermione discovers, or perhaps the rescue mission goes horribly wrong at first. These twists keep the readers engaged and eager to find out what will happen next.
One great 'Hermione Held Captive' fanfic is 'The Captivity of Hermione' by an unknown author. It has an interesting plot where Hermione is held captive by a dark wizard but uses her wits to outsmart him at every turn. The story is full of suspense and the author does a great job of keeping the readers on the edge of their seats.
A third plotline could be about the captors' motives. In some fanfictions, the men holding the anime girl captive might have complex motives. It could be for some sort of power play, like they want to use her as a bargaining chip against someone else in the anime world. Or they might have a strange, misdirected affection for her and are holding her captive in an attempt to 'protect' her in their own warped way.
There could be a more complex ending. For example, the girl, through her interactions with the kidnappers, actually helps one or more of them see the error of their ways. They then turn themselves in, and the girl is released. This ending would show the power of redemption and the human capacity for change, even in such a dark situation.
One possible plot could be the girl's struggle to escape after being sedated. She might use her wits while in captivity to find a way out, like looking for weaknesses in the kidnappers' routine. Another could be the rescue attempt by her friends or family who are desperately searching for her. They might follow small clues that lead them to where she is being held.
One such novel could be 'Incidents in the Life of a Slave Girl' by Harriet Jacobs. It details the life of a female slave, effectively held captive in 19th - century America. The protagonist endures many hardships and the narrative sheds light on the brutalities of slavery for women during that time.
There's a possibility that a new, unknown and powerful monster could be the captor. This monster could be a hybrid of different mythological creatures, created by some dark magic. It has heard of Percy's fame and power and wants to keep him captive either to study him, or to use his power to become even more powerful itself. It could have a lair in a hidden and dangerous place, like an underground cavern filled with deadly traps.
Well, in this type of fanfiction, the anime girl is clearly in a vulnerable position. She's held against her will, which shows her lack of power. The captors, on the other hand, have power over her. This sets up a basic exploration of the power dynamic.