One popular Stranger Things cast fanfiction might be those that focus on the friendship between the kids off - screen. For example, stories about how they bond during filming breaks and play pranks on each other. Another type could be romantic fanfictions that pair different cast members in fictional relationships, like a story where Eleven and Mike's actors have a secret off - screen romance. There are also fanfictions that explore the cast's adventures in a modern - day setting outside of the Stranger Things universe, like them going on a road trip together.
Archive of Our Own (AO3) is a great place to start. It has a large collection of Stranger Things fanfiction, including those focused on the cast. There are various tags you can use to filter and find the specific type of cast - centered stories you're interested in. Another option is Fanfiction.net, which also has a decent amount of Stranger Things cast fanfiction. However, the quality may vary more compared to AO3.
Well, time travel is a cool theme. Some fanfictions might have the characters going back in time to prevent certain events in the show from happening, like the opening of the gate to the Upside Down. Then there's the theme of alternate universes. Imagine a universe where Eleven was raised by Brenner in a completely different way. And of course, the theme of romance. You can find a lot of fanfictions about Mike and Eleven's relationship, but also other possible pairings among the characters.
I think Dustin is really interesting to write about. His love for science and his quirky personality can lead to some really fun storylines. He could be involved in some new scientific discovery in Hawkins that's related to the Upside Down. Joyce Byers is also a great character to write about. Her determination to find her son in the first season and her overall strength as a mother can be the focus. And then there's Billy. His complex and often troubled character can be explored, like what made him the way he is and if he could be redeemed in fanfiction.
The younger characters like Lucas and Max might get really excited about the fanfiction. They could see it as an extension of their own adventures. They might start imagining themselves in the scenarios written by the fans. It could also inspire them to think about their own actions in different ways, like if a fanfiction shows them facing a new type of danger in the Upside Down, it could make them feel more brave and ready for future challenges in their real story.
In general, it is legal to watch Stranger Things fanfiction. Fanfiction is a form of creative expression by fans and as long as it doesn't violate any copyright laws in terms of using the show's characters in a way that is clearly not allowed (like for commercial gain without permission). It exists in a sort of gray area legally, but for personal enjoyment, it's usually okay.