Captain America is a popular choice for the Avengers side. His leadership skills and unwavering moral compass can provide guidance to the combined team. On the mutant side, Jean Grey with her telekinetic and telepathic powers can be a very interesting character to write about. Her struggle with the Phoenix Force can add a lot of depth to the story.
Hawkeye from the Avengers can bring a different kind of combat style with his archery skills. And for the mutants, Beast with his superhuman strength and intelligence can be a great character. He can contribute to scientific research within the team and also be a formidable fighter when needed.
April O'Neil is a classic choice. She's a human character who has a long - standing relationship with the turtles. Her skills as a reporter can add an interesting dynamic to the story.
Itachi can be a very interesting character in Naruto omega mutant fanfiction. His past actions and his own powerful abilities can contrast and interact with Naruto's omega mutant nature. Jiraiya is another one. He could be the one who first discovers Naruto's mutant abilities and helps him start on the path of understanding and mastering them. Then there are the Akatsuki members, whose motives and actions can be affected by Naruto's new omega mutant status.
Well, from the X - Men universe, Wolverine would be a great addition. His healing factor and his tough - guy attitude would add a different dynamic to the Avengers. Also, from the Transformers, Optimus Prime could be included. He could provide the Avengers with some powerful machinery and his leadership skills. And from the Teenage Mutant Ninja Turtles, Leonardo would be interesting. His ninja skills could complement the Avengers' combat abilities.
The theme of overcoming prejudice is quite prevalent. Many times, the mutant OC faces prejudice from within the Avengers or from the outside world. They have to overcome this and prove their worth. Additionally, the theme of self - discovery is often explored as the OC discovers new aspects of their powers and themselves.
Some original omega - level mutants created specifically for the fanfiction can also become popular. For example, an omega - level mutant with the power to manipulate time might be a really cool and popular character. Their interactions with the SI character and how they use their power to change or protect the mutant world can make them stand out.
Hermione is often a popular character in such fanfictions. Her intelligence can be combined with mutant - like powers, say super - intelligence where she can process information at an even faster rate. She could use this to solve complex magical and mutant - related problems.
Often, original characters created by the fanfic authors themselves become popular. These are the ones with really unique omega level powers and interesting backstories. For example, a character who can control all forms of energy and has a tragic past of being experimented on by an evil organization.
Miss America Chavez is quite popular. Her ability to punch through dimensions makes for some really cool plotlines in fanfiction. Writers often explore how she uses this power in different situations.
Obviously, the babies of the main Avengers like Iron Man, Captain America, Thor, and Black Widow are popular. Their unique combinations of powers and personalities make for interesting stories. Also, characters like Hulk's baby (if there is one in the fanfic) would be popular due to Hulk's raw power. And sometimes, characters like Loki might also play an important role, either as an ally or a potential threat to the babies.
Loki is often a popular character. In Avengers University fanfiction, he could be a mischievous student or even a visiting lecturer with a hidden agenda. His charm and his ability to cause trouble make him an interesting addition to any story.