Well, it could start with Red X having some ulterior motive like using Starfire to get to the Teen Titans. Maybe he plans to ransom her or use her powers for his own gain. He might keep her in a hidden lair and Starfire would be trying to escape while also trying to figure out what Red X really wants.
In a 'Starfire kidnapped by Red X' fanfiction, the plot might involve Red X being hired by an unknown villain to kidnap Starfire. Red X could be conflicted during the kidnapping as he might have some feelings for Starfire that he doesn't want to admit. Starfire, on the other hand, would be using her alien strength and powers to try and break free from whatever restraints Red X has put on her.
The story could go like this. Red X sees Starfire as a key to getting a powerful artifact that the Teen Titans are protecting. So he kidnaps her. Starfire is initially shocked and scared but then she realizes she has to be strong. She tries to reason with Red X, but he is stubborn. Meanwhile, the Teen Titans are searching for her, and Red X has to keep her hidden while also fending off other villains who might want to steal Starfire from him for their own purposes.
Obviously, Red X would be the main antagonist as he is the one doing the kidnapping. But there could also be other antagonists in the background. For example, if Red X was working for someone else, that person could also be an antagonist. Maybe a powerful intergalactic criminal who wants Starfire's powers for his evil plans.
One possibility could be that Red X is under some sort of mind control and is made to target Starfire. He binds her tightly as part of a plan to hold her hostage in order to get something from the Teen Titans. Maybe he wants some powerful artifact that the Titans are protecting and he thinks Starfire is the key to getting it.
Well, often there could be elements of conflict between Starfire and the Red X goo. Maybe the goo has some sort of strange power that affects Starfire physically or mentally. For example, it could be weakening her powers or causing her to have strange visions. Another common plot element might be Starfire's attempts to break free from the goo's influence. This could involve her using her own strength, both physical and mental, or seeking help from her friends in the Teen Titans.
I'm not sure specifically as I haven't read this particular fanfiction. But it might involve Starfire facing some sort of challenges or conflicts while being in a situation related to Red X. Maybe it's about a fight they get into or an emotional struggle between them.
Well, it could involve Starfire trying to break free from the bindings physically. Maybe she uses her alien strength or some hidden powers.
The red x adhesive could be a key element in a time - travel fanfiction involving Starfire. It might be something that was created in the future and accidentally sent back in time. Starfire discovers it and tries to figure out its purpose. Along the way, she might meet different versions of herself or other characters, all while dealing with the strange properties of the adhesive.
One common theme is trust. Since Red X is a rather mysterious character, Starfire often has to learn to trust him or not. For example, in many fanfics, they start off as distrustful of each other but gradually build trust as they face challenges together.
One characteristic is the exploration of their opposing personalities. Red X is more of a anti - hero, while Starfire is a heroic and positive character. Fanfictions may focus on how they clash or find common ground. For example, they could be forced to work together on a mission, and during that time, they start to see each other in a new light. Maybe Red X shows a softer side that Starfire didn't expect, or Starfire's optimism starts to rub off on Red X. Also, the fanfictions might delve into the power dynamics between them, considering their different abilities and how they complement or conflict with each other during battles or other situations.
You can try searching on fanfiction platforms like FanFiction.net or Archive of Our Own. Just use the keywords'red x kidnaps starfire' in their search bars. There might be some great stories out there that match this plot idea.
Other minor characters from the Teen Titans universe might also make an appearance. Maybe some of the villains that are associated with Red X could be there in the background, influencing his actions towards Starfire. Or some of the civilians that the Teen Titans protect, who could be caught in the crossfire of this struggle between Starfire and Red X, and their presence could add more complexity to the story.