Saitama is by far the most popular. His unique power of being able to defeat any opponent with one punch makes him a fascinating character to insert into other universes. Whether it's facing off against powerful foes in Naruto's ninja world or the superpowered individuals in My Hero Academia, his presence always shakes things up.
Giorno Giovanna is also very popular. His ability to create life with Gold Experience gives a lot of room for creative crossovers. Writers can come up with all kinds of scenarios where he uses his power in new and different ways when interacting with other characters. Dio Brando is another one. His iconic status and over - the - top villainy make him a great character to include in crossovers, whether it's seeing him face off against new opponents or team up in some strange alliances.
Genos from One Punch Man is also quite popular. He could be paired with Tanya in a fanfiction, perhaps as they compare their combat styles or technological enhancements. Also, in Youjo Senki, Viktoriya Ivanovna Serebryakov is sometimes used in fanfiction as she has a strong relationship with Tanya and could add more depth to a crossover story.
Raiden is also quite popular. His cybernetic enhancements and complex backstory offer a lot of potential for crossovers. He can bring a different kind of action and character development to the fanfic.
The Soldier is quite popular in Team Fortress 2 crossover fanfic. His patriotism and his over - the - top military style can be really interesting when combined with other military - themed characters from different franchises. Also, his rocket launcher can lead to some really explosive and action - packed scenes in crossovers. The Demoman is also a favorite. His love for explosives and his one - eyed, drunken - pirate - like appearance can be a great addition to many crossover stories, especially when paired with other rowdy or explosive - loving characters.
Batman is definitely one of the most popular. He's the central figure of the bat family, so it's natural that he features prominently. Dick Grayson, as both Robin and Nightwing, is also very popular. His acrobatic skills and complex relationship with Batman make for great story material. Batgirl, whether it's Barbara Gordon or Cassandra Cain, is also a fan favorite. Her intelligence and combat abilities add a lot to the crossovers.
The Sunflower is often a popular choice. It's such an iconic plant in the game, and its ability to produce sun can be used in really creative ways in a crossover fanfic. For example, it could power up some kind of special zombie - plant hybrid machine.
Spyro is always a popular choice. He's one of the most well - known Skylanders and has a rich backstory that can be easily incorporated into crossovers. For example, he could be the leader of a group of Skylanders from different areas coming together.
Krawk is a popular character. It has a cool and somewhat menacing appearance which can add an interesting dynamic in crossovers. Another is the Shoyru. It's dragon - like and can bring a sense of magic and power. The Lupe is also often used. It has a wolf - like appearance and can be portrayed as a fierce and loyal character in crossovers.
Master Chief is definitely one of the most popular. He's the face of the Halo series, so fans love to see him in crossovers. Cortana is also a popular choice. Her complex character and her relationship with Master Chief make for interesting crossovers. The Arbiter is another character that often features. His unique backstory and his role in the Halo universe can add a lot to a crossover story.
Dolores is often a popular character in crossovers. Her journey of self - discovery and her complex nature make her a great fit for interacting with characters from other universes. Maeve is also quite popular. Her ability to manipulate the world around her and her strong will can lead to interesting crossovers. The Man in Black is another one. His mysterious nature and his search for deeper meaning in the Westworld can be a great starting point for crossovers, for example, with a character from a mystery - based universe who is also on a similar quest.