The Missing Link is also quite popular. His brash and confident personality can add a lot of humor and action to a fanfic. He could be on a quest for glory or trying to prove himself to the other monsters.
Dr. Cockroach is a fan favorite as well. His mad - scientist ways and his insect - like appearance make him stand out. A fanfic could focus on his experiments going wrong or right in unexpected ways and how he deals with the consequences.
In addition to the regular Naruto characters, some of the more powerful monsters could be main characters too. For instance, a giant dragon - like monster that has the power of flight and can breathe ice. It could be a reluctant ally at first but then grow to respect Naruto and his friends. And among the aliens, there could be a leader - type character who is extremely intelligent and has unique powers that pose a great threat to the Naruto world.
Master Chief from Halo is often a popular choice. His badass, no - nonsense attitude and his combat skills make him a great character to put up against the Jedi or Sith in Star Wars. In Star Wars, Darth Vader is also a very popular character to include. His iconic look and his powerful Force abilities can create some really intense scenes when pitted against Halo characters.
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.
Sulley and Mike are definitely the most popular. Sulley is the big, furry blue monster who is the star scarer, and his relationship with Mike is really fun to explore in fanfiction. Boo is also very popular as she is the cute human girl who befriends the monsters.
The main characters include Susan Murphy, who becomes Ginormica. There's also The Missing Link, B.O.B., and Insectosaurus. And of course, the alien villain Gallaxhar.
The werewolves are quite popular. Remus Lupin's story has a lot of potential for further exploration in fanfiction. Writers can create more werewolf characters or expand on the werewolf community.
Tyrone is a favorite as well. His laid - back yet reliable nature is appealing. He could be the one who keeps the group calm during a crisis in the fanfic, or he could be the one who discovers a new area of the backyard that leads to an exciting adventure.
Aphmau herself is obviously a very popular choice. Her journey and development are interesting to explore further in fanfics. Aaron is also a favorite among fans. His relationship with Aphmau and his own backstory provide a lot of material for fanfic writers.
Another one could be Luna, the wise old cat. She has a lot of knowledge about the Catswold's history and secrets. Writers can have her guide the younger cats or solve complex problems using her wisdom, which makes her a great character to feature.
Midoriya is extremely popular. His journey from being quirkless to a powerful hero - in - training is very inspiring, and there are many ways to explore his character further in fanfic. Bakugo is also a top choice. His complex personality, with his aggressive nature and underlying insecurities, offers a lot of material for writers. Todoroki is another popular one. His troubled family history and his dual - quirk ability make him a fascinating character to write about.