Keith will likely be defiant. He has a strong sense of justice and will not be easily broken by Zarkon. He might try to fight back immediately if he has the chance.
Well, one possibility is that the other members of Keith's team will launch a rescue mission. They might use their unique skills and technology to track Zarkon's location. For example, if they have some sort of advanced tracking device or a spy within Zarkon's ranks. Another thing could be that Keith manages to escape on his own. Maybe he finds a weakness in Zarkon's prison or overpowers the guards. And it's also possible that Zarkon has some ulterior motive for kidnapping Keith, like using him as a bargaining chip against the other heroes.
It could be an old enemy of Keith's, someone from his past who has a vendetta against him. Maybe a former rival from his days in the military academy who has now turned to more devious means.
One possible plotline could be that Keith is kidnapped by an enemy force. His friends then embark on a dangerous rescue mission, facing various challenges along the way. Maybe they have to infiltrate a heavily guarded enemy base to find and free him.
The story could also take a more emotional turn. Keith's kidnapping could be a major blow to the team's morale, especially for Lance who might feel guilty for not being able to protect him. Meanwhile, Keith could be facing his own internal struggles while in captivity, dealing with memories of his past related to the Galra, and trying to stay strong mentally so that he can hold out until his friends come to rescue him.
Keith initially reacts with defiance. He's a fighter, so he would likely struggle against his captors right from the start. He might try to break free of his restraints and attack any Galra who get too close, even if he's outnumbered.
One of the main characters could be Shiro. Shiro has always been like a big brother to Keith. So when Keith turns into a girl, Shiro would be there to help him adjust. He'd make sure Keith is safe and comfortable in his new form. Also, Hunk could be a main character. Hunk would probably be the one to offer emotional support and cook some comfort food for Keith during this tough time of adjustment.
One great 'Hurt Keith' fanfiction is 'The Trials of Keith' on Archive of Our Own. It delves deep into his emotional turmoil after a tough battle. The author really captures his pain and how he struggles to come to terms with it.
Yes, he could be. If Keith is into Harry Potter fanfiction, there's a chance he might be a writer creating his own stories within the Harry Potter universe.
There are many places to find Shiro and Keith yaoi fanfiction. Fanfiction.net and Archive of Our Own (AO3) are two popular platforms. On these sites, you can search for tags related to Shiro, Keith, and yaoi to narrow down your results. Just be aware that the quality of the fanfictions can vary widely.