In 'The Flash Crisis on Earth X' fanfiction, one of the key characters is Eobard Thawne, Reverse - Flash. His complex relationship with Barry and his knowledge of time - travel can create really interesting plot twists. Also, Sara Lance, White Canary, is important. Her combat skills and her experience with the Legends of Tomorrow team bring a different dynamic to the story. And Cisco Ramon, with his ability to create and manipulate technology, is often vital in fanfictions as he can come up with solutions to various problems.
Barry Allen is quite popular. His speedster abilities can create a lot of interesting scenarios in the Crisis on Earth X setting. Writers can explore how his powers work differently on Earth X or how he teams up with alternate versions of himself.
One interesting concept could be exploring alternate versions of characters that we didn't see in the original 'The Flash Crisis on Earth X'. For example, what if there was a version of Barry Allen with different powers or a different moral code? Another concept could be delving deeper into the relationships between characters from different Earths. Maybe a fanfiction could focus on the friendship or rivalry between characters that only briefly interacted in the actual storyline.
One aspect to consider in 'Crisis on Earth X' fanfiction could be the exploration of alternate versions of characters. Writers often take advantage of the multiverse concept in this storyline to create unique character arcs that deviate from the original canon.
Fanfiction often gives the opportunity to develop secondary characters more. In the context of Crisis on Earth X, these characters can play crucial roles. They might have unique skills or knowledge that help in dealing with the crisis, and their growth and contribution can be a central part of the fanfiction story.
Supergirl could have a major role. Her strength and powers would be very useful in the Crisis. She could be the one to lead the charge against the villains from Earth X. Also, Reverse Flash. He is always causing trouble and in a crossover, he could form an alliance with the villains of Earth X for his own gain.
Naruto is often still a very popular character in Naruto Crisis Fanfiction. His growth and development in these new, often more challenging situations is a big draw. Sasuke is also popular as readers are interested in seeing how he fits into the new storylines. Kakashi remains a fan favorite too, as his wisdom and badassery are always great to read about in these fan - created stories.
There could be scientists as main characters. They are often at the forefront of finding solutions to environmental problems, like developing new clean energy technologies or ways to combat climate change.
Well, in some fanfictions, there might be a plot twist where the portals between the different Earths malfunction in a new way. Instead of just allowing the heroes and villains to cross over, they start merging certain parts of the different Earths. So you might have a city on Earth - 1 that suddenly has a section that looks like it's from Earth - X. This would create all sorts of chaos and new challenges for the characters to deal with. It also gives an opportunity for different versions of the characters to interact in unexpected ways, like a more peaceful version of a villain from one Earth having to face off against their more malevolent counterpart from another Earth that has now invaded their space.
The Turks are the important characters. For example, Reno and Rude are well - known members. They play significant roles in the various missions and operations of the Turks.
Obviously, The Flash and Supergirl themselves are very popular. Their unique powers and personalities make them central to most fanfictions.