The professional heroes might get involved. All Might, if he's still around in the fanfiction, could use his experience and power to find Deku. He could lead a team of heroes, like Endeavor and Hawks, to plan a rescue mission. They would analyze Toga's patterns and likely places of hiding, and then swoop in to save Deku.
His friends could come to the rescue. Bakugo, for instance, might use his explosive power to break into Toga's hideout. He's always been competitive with Deku, but he also cares about him deeply.
Deku himself could find a way to escape. He's smart and resourceful. He might figure out a weakness in Toga's security or use his quirk in an unexpected way. Maybe he could create a distraction with his One For All power and then make a run for it while Toga is distracted.
Well, one possibility is that Toga kidnaps Deku to get closer to the heroes. Maybe she thinks she can use Deku as a bargaining chip to make the heroes do something for her. For example, she might demand the release of some of her villain friends from prison.
Their relationship could start with mutual self - interest. They both recognize the power and chaos the other can bring. For example, Toga's ability to transform could help Villain Deku infiltrate places, and he can offer her protection in return.
One interesting Deku and Toga fanfiction could be about them forming an unexpected alliance. Maybe in a world where the hero - villain divide is not so clear - cut, they team up to face a greater threat that endangers both heroes and villains alike.
Deku might be completely shocked at first. Since Bakugou has always been so aggressive towards him, he would never expect such a confession. He might just stand there, mouth agape, not knowing what to say.
For Deku, his character can be developed by showing his struggle to understand Toga's family's situation. He has to balance his hero values with the new perspective he gets from being involved with them. For Toga, her character can grow as she learns to trust Deku more in the context of her family. Her family members can be developed by giving them unique personalities and backstories. For example, one family member could be a former hero who retired due to an injury, and this could add depth to the story.
His friends could use their various quirks to track him. For example, if there are characters with enhanced sense of smell or the ability to detect energy, they could start the search. Then, they would plan a strategic attack on the kidnappers' hideout.
One possible plot could be that Deku discovers Toga has a family she has been separated from. Deku decides to help her reunite with them. Along the way, they face various villains who are after Toga. As they journey together, they start to understand each other better and form an unexpected bond, not just between them but also with Toga's family when they are finally found.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fan - created works, and you're likely to find a good number of Deku and Toga fanfictions there. Just use the search function and type in 'Deku and Toga' to filter the relevant stories.
One popular 'deku x toga fanfic' is 'A Different Kind of Bond'. It explores an interesting dynamic between the two characters where they start to understand each other beyond their initial differences. It has great character development and a unique plot.
Dumbledore could play a crucial role in her rescue. He has great wisdom and powerful magic. He might sense that Hermione is in danger through his magical connections. Then he could send some of the more skilled members of the Order of the Phoenix, like Sirius or Lupin, to find and rescue her. They would be able to use their combat skills and magic to overpower Rabastian.