Felicity Smoak from Arrow is often a fan - favorite in crossovers. She can provide the tech support and her relationship with the heroes adds an interesting layer. And then there's Reverse - Flash, who can be a great antagonist in a crossover, creating a lot of tension and high - stakes situations.
Black Canary from Arrow is another great character to include. Her martial arts skills combined with the Flash's super - speed or Arrow's archery could lead to some really exciting fight scenes. Also, Caitlin Snow from the Flash can add a scientific perspective to the crossover, especially when dealing with any meta - human or scientific threats.
Obviously, The Flash and Arrow themselves are must - includes. Their dynamic and different power sets make for great interactions. Also, Cisco Ramon from the Flash side is popular as he can bring in his tech - wizardry to help in the crossover.
Oliver Queen, or Arrow, is also highly popular. His skills with a bow and arrow, along with his brooding and complex personality, add a lot of depth to the crossovers. He is often the more serious and strategic one compared to Barry.
Well, obviously the Flash and Arrow themselves are very popular. Their dynamic, with the Flash's light - heartedness and super - speed contrasted with Arrow's brooding and combat skills, is really appealing. But also, characters like Felicity Smoak are often popular. She's smart and has great chemistry with both heroes, so she often plays an important role in fanfictions.
Barry Allen is a very interesting character to write about. His super - speed gives a lot of scope for creative writing. You can explore how he experiences time differently, or how he uses his speed in unique ways to solve problems. Oliver Queen is also great. His dual identity as a playboy billionaire and a vigilante archer provides a lot of depth. Writers can delve into his internal struggles, like his fight against his dark side and his journey to become a better hero.
Felicity Smoak could also be a key character. She's the tech - genius in the Arrowverse. In a crossover fanfiction, she could play a crucial role in creating a device that helps The Flash and Arrow defeat a high - tech villain. Her relationship with both heroes adds an extra layer of drama and humor.
Definitely Venkman. His sarcastic and witty personality can create great interactions in crossovers. For instance, if he were in a crossover with the X - Men, his humorous take on the mutants' powers would be hilarious.
Hajime Nagumo from 'arifureta' is a popular choice. His overpowered abilities and his journey from being a weakling to a powerful hero make him an interesting character to put in crossovers. Yue is also very popular. Her magic and her relationship with Hajime can add a lot of depth to a crossover story. Another character is Shea. Her energetic and somewhat naive personality can create humorous and interesting interactions in a crossover.
Akagi is another fan - favorite. Her character has depth and mystery. In a crossover, she could be the key to unlocking some complex plotlines, perhaps she has a connection to a powerful artifact in another world or has some hidden knowledge that is crucial for the story.
In Ben 10 crossover fanfiction, many writers like to include Azmuth. As the creator of the Omnitrix, he has a wealth of knowledge and power. His presence can add a layer of depth to the story, especially when it comes to explaining the science behind the Omnitrix or helping Ben understand new alien forms. Also, Charmcaster is often included. Her magic abilities can create some interesting dynamics when combined with Ben's alien powers in a crossover.
Joker is definitely one of the most popular. His cool and mysterious demeanor makes him a great fit in various crossovers. Also, Morgana is often included as his sidekick. Another popular character is Makoto, with her strong - willed and intelligent personality.
Batman himself is obviously a must - include. His leadership and skills are central to the Batfamily dynamic. Also, Robin, especially Damian Wayne as his complex relationship with Batman adds a lot of drama. Nightwing is popular too, with his acrobatic skills and his own journey away from being Robin. Batgirl, like Barbara Gordon, is often included for her intelligence and fighting abilities. And Alfred, the ever - loyal butler, who often provides support and wisdom to the family.