Laval is a very popular character. He is the prince of the Lion Tribe and his bravery and leadership make him a great focal point for many fanfictions.
Cragger, the Crocodile Prince, is also often featured. His complex relationship with Laval, ranging from rivalry to friendship, offers a lot of story potential.
Eris, the Eagle Tribe member, is popular too. Her intelligence and ability to fly give her an edge in many adventures. Fanfiction writers often use her skills to create exciting rescue or exploration scenarios.
Spyro himself is of course a very popular character to feature. He is the main protagonist, and his journey of growth and discovery makes for great fanfiction material.
Gray Fullbuster is also a favorite. His ice - make magic and his rivalry with Natsu are great elements to play with in fanfiction. You can write about his past and how it affects his present actions. Erza Scarlet is very popular too. Her strong - willed and fearless personality, along with her amazing combat skills and her collection of armors, make her an interesting character to base a fanfiction around. She could be on a quest to find a new and powerful armor, for example.
Kakashi could be another popular one. His intelligence and wide array of skills, along with his mysterious past, can add a lot of depth to a Naruto Brutal Legend fanfiction. He could be the one guiding the other characters or be in the middle of some intense battles, using his quick thinking and combat experience to overcome the obstacles in the Brutal Legend world.
Link is by far the most popular. Since he is the main protagonist in the Zelda series, he is often the center of time travel stories. Writers like to explore his journey through different time periods, his growth as a hero, and how he copes with the changes that time travel brings.
Laval is definitely a great choice. He's the main hero in Chima, so he can bring his leadership and courage to any crossover. Eris would also be good as she has her own unique powers. In a crossover with Ninjago, for example, her powers could complement the ninja's skills. Another great character is Cragger. His sometimes - villainous nature can add an interesting dynamic. If there's a crossover with a more villain - heavy story, he could be a key player. And don't forget about Worriz. His cunning and combat skills can make for some exciting interactions in a crossover situation.
Sakura is also quite popular. Fanfiction often focuses on her development as a kunoichi, her relationships with Naruto and Sasuke, and how she overcomes her insecurities. There are many stories that give her more agency and power than in the original series.
Dr. Colosso, the family's pet bunny who is actually a supervillain, is another popular character. Fanfiction might explore his backstory more deeply or have him team up with other villains in a plot to finally defeat the Thunderman family.
JD Fenix is also quite popular. As Marcus's son, he has his own story arc in Gears 5 that can be expanded upon in fanfiction. You can explore his relationships with other characters more deeply, like his friendship or rivalry with other soldiers. Del Walker is another character that fans like to feature. His unique personality and his role in the team can lead to some interesting fanfic stories.
Jareth is by far one of the most popular characters. His mysterious and powerful nature makes him a fascinating subject. Writers can explore his backstory, his relationship with the Labyrinth, and his complex emotions.
Neo is definitely one of the most popular. His journey as 'The One' offers a lot of scope for further exploration. Writers can continue his story after the events of the movies, or even rewrite parts of it. Trinity is also very popular as she is a strong female character. Fanfiction might explore her past more or create new adventures for her. Morpheus is another favorite, with his wisdom and leadership being great elements to build stories around.