Nightwing would be an interesting character to pair with Starfire in crossover fanfiction. They have a history in the DC universe, and in a crossover, their relationship could be explored further in new and different settings. Another one could be Spider - Man. The contrast between her alien powers and his more street - level superhero abilities would make for an exciting story.
I think Goku from Dragon Ball Z could be a really interesting character to pair with Starfire. His Saiyan nature and her Tamaranian nature both have some similarities in terms of being powerful alien - like species. They could have some amazing battles or team - ups. Also, Harry Potter could be an interesting match. Imagine Starfire in the magical world of Hogwarts, it would be full of comical and exciting situations as she tries to understand magic.
Captain America would be a great character to pair with Starfire. His sense of justice and leadership could interact well with Starfire's own strong moral compass. In a crossover, they could lead a team against a common enemy. And then there's Wolverine. His rough and tough personality against Starfire's more positive and upbeat one could create a lot of interesting character dynamics in a fanfiction.
Hermione Granger from Harry Potter would be an interesting pair. Hermione is highly intelligent and knowledgeable about magic, while Sabrina has her own unique brand of magic. Their interaction could involve Hermione trying to understand Sabrina's more chaotic magic, and Sabrina learning from Hermione's book - smarts. Another great pairing could be Buffy Summers. As a vampire slayer, Buffy has a different kind of strength and purpose, and her world of demons and vampires would contrast with Sabrina's more traditional witchcraft world.
Robin could be a great addition. He could act as a bridge between Starfire's more light - hearted nature and Batman's seriousness. His acrobatic skills and detective training could complement both of them in a fight. Another good character would be Nightwing. He has a connection to Batman already and his charm could add an interesting element when interacting with Starfire.
Beast Boy is another good option. His ability to transform into different animals can bring humor to the fanfiction. He could also be a mediator between Starfire and Blackfire, using his light - hearted nature to ease the tension between the two sisters. His friendship with Starfire can also be explored further in relation to Blackfire.
The Road Runner could be an interesting character to pair with Rango. Their different styles of movement, with Rango being more of a swaggering walker and the Road Runner being super - fast, could create some really fun and comical interactions. Another great pairing would be with Shrek. The contrast between Shrek's ogre - like nature and Rango's lizard self would make for a great story of two misfits coming together.
War would be an interesting character to pair Strife with. They are both from the Darksiders universe, and their different fighting styles and personalities could create some great interactions. For example, War is more brute force while Strife is more agile, and seeing how they work together or clash in a crossover situation would be exciting. Another good pairing could be Dante from the Devil May Cry series. Dante is also a demon - slaying badass, and his cocky attitude might either rub Strife the wrong way or lead to an epic bromance as they take on hordes of demons together.
One interesting character to pair him with could be Loki from the Marvel universe. They both have a knack for trickery and causing chaos. Another option could be the Joker from Batman. Their different styles of madness could create some really wild interactions. Also, pairing him with Alucard from Hellsing would be cool. Roman's human cunning against Alucard's supernatural powers would make for an exciting dynamic.
One interesting character to pair him with could be Goku from Dragon Ball. The contrast between Madara's ninja skills and Goku's Saiyan power would make for an exciting dynamic. Another could be Harry Potter. Imagine Madara in the wizarding world, and how he would interact with Harry, who has his own set of powers and a strong sense of justice. Also, Batman would be an interesting match. Batman's strategic mind against Madara's battle - hardened tactics would be a great battle of wits.
A very interesting character to pair Mirio with is Luffy from One Piece in a crossover. Luffy's carefree and determined nature along with his stretching powers would be an interesting contrast to Mirio's Permeation. They could form an unlikely but strong alliance. Another character is Ichigo from Bleach. Mirio and Ichigo could fight side - side against Hollows and other threats, with Ichigo's sword skills and Mirio's hero abilities complementing each other. Also, pairing Mirio with Naruto would be great. Naruto's never - give - up attitude and his use of ninjutsu could create a unique dynamic when combined with Mirio's hero powers.
Lucy Heartfilia could be paired with Zancrow. She has a different set of abilities and a more diplomatic personality. Her interactions with the hot - tempered Zancrow could lead to some interesting character development for both. She might try to reason with him or use her celestial magic in unexpected ways against his fire attacks.
Link from The Legend of Zelda could be paired with iskandar. Link is a skilled fighter, and iskandar could learn from Link's agility and stealth. In return, iskandar could teach Link about large - scale battle tactics. Also, Alucard from Hellsing would make an interesting pairing. Alucard's dark powers and iskandar's noble leadership would create a contrast, and they could either be enemies or allies depending on the story.