Well, an unlikely alliance in this fanfiction could be between Ben and Natsu. Natsu is all about fire and brute force, while Ben has his various alien forms with different abilities. They could initially clash due to their different approaches to fighting, but then realize that together they can be much stronger. For instance, if Ben transforms into an alien with wind - based powers, he could enhance Natsu's fire attacks.
An interesting aspect of a Ben 10 and Fairy Tail fanfiction about unlikely alliances could be the pairing of Ben's more tech - savvy alien forms with the magic - centered Fairy Tail world. Maybe Ben's alien form that can manipulate technology teams up with Levy, who is a bookworm and expert in magic scripts. They could come up with some really unique ways to defeat enemies. Ben could use his alien tech to analyze and counteract dark magic, while Levy uses her knowledge of magic to enhance Ben's tech's effectiveness.
In a story of unlikely alliances in Ben 10 and Fairy Tail fanfiction, we could see an alliance between Ben when he transforms into an alien with healing abilities and Wendy from Fairy Tail. Wendy is a Sky Dragon Slayer with healing magic. Together, they could form a sort of mobile medical unit in the middle of battles. They could also learn from each other's healing techniques, Ben from his alien biology and Wendy from her dragon - taught magic. This would not only be useful for their own side but also for any civilians caught in the crossfire.
A simple alliance in this fanfiction could be between Shiemi Moriyama and Lucy Heartfilia. Shiemi could use her knowledge of plants and herbs, which might be useful in creating potions or antidotes in the Fairy Tail world. Lucy, with her celestial spirits, could provide protection for Shiemi when they encounter demons.
Another interesting alliance could be between Ron and Keroberos. Ron, with his love for food, might be constantly bribing Keroberos with treats to get information about the Clow Cards or to ask for his help in some comical situations. Keroberos, being a bit of a glutton himself, would be easily swayed by Ron's offerings.
A simple alliance in this fanfiction could be that Baiken helps Naruto with her sword skills. Naruto is mainly a ninjutsu user, so her sword - based combat knowledge could be a great addition to his fighting repertoire.
In fanfiction, Neji and Sakura could form an unlikely alliance against a common foe within the Hidden Leaf Village. This could be due to some political intrigue where they have to trust each other despite their different personalities.
Another aspect in a fanfiction could be their cultural differences. Naruto comes from a world of ninjas with strict honor codes, while Shego is from a more modern - ish world with different moral values. This could lead to many comical or thought - provoking situations. For instance, Naruto might be shocked by Shego's casual attitude towards stealing or using underhanded means in combat. However, as they spend more time together, they begin to see the value in each other's perspectives. They might even influence each other's ways of thinking and acting, with Naruto making Shego more empathetic and Shego teaching Naruto to be a bit more flexible in his approach to problems.
A fanfiction could also explore the idea of Starkiller and Ahsoka meeting in a post - Empire world. Starkiller, having broken free from his Sith past, and Ahsoka, who has seen so much of the galaxy's turmoil, could join forces to help rebuild and protect the newly - emerging peaceful systems. They would have to overcome their differences, as Starkiller has a more aggressive style while Ahsoka is more in tune with the Jedi's peaceful ways. But their shared goal of a better galaxy could bring them together. They could start by training a new generation of Force - sensitive beings, combining their unique teachings to create a more balanced approach to the Force.
One interesting scenario for a Naruto and Manyuu Hikenchou fanfiction regarding unlikely alliances is that Naruto, in his never - ending quest for peace, meets a holder of the Manyuu Hikenchou who is from a very different culture. At first, there are misunderstandings due to cultural differences. However, as they get to know each other, they find that they both have a deep - seated desire to protect the innocent. So, they form an alliance. This alliance is not just a fighting partnership but also a cultural exchange. Naruto learns about the unique traditions associated with the Manyuu Hikenchou, and the other character learns about the ninja way. Together, they are able to overcome challenges that neither could have faced alone.
In a fanfiction, Naruto, Sakura and Kakashi could form an unlikely alliance with a group of rogue ninjas. These rogue ninjas initially oppose Team 7 but later realize they have a common enemy. The enemy is a powerful ninja who wants to take over all the ninja villages. Naruto's positive attitude starts to rub off on the rogues, and Sakura heals their wounds during battles. Kakashi, with his Sharingan, is able to analyze the enemy's moves and come up with strategies. Together, they manage to defeat the power - hungry ninja and in the process, change the perception of the rogue ninjas among the other villages.
In this type of fanfiction, the power dynamics between Dark Naruto and Rias would be really interesting. Dark Naruto has his own set of chakra - based powers which are extremely powerful and often uncontrollable. Rias, on the other hand, has her demonic powers and a group of loyal servants. If they form an alliance, they would need to figure out how to work together. Maybe Rias would try to find a way to control Naruto's dark power, or perhaps they would find a way to combine their powers in a new and unexpected way, like creating some sort of hybrid attack that combines Naruto's Rasengan with Rias's demonic energy.
In Batman and Bruce Banner fanfiction, there could be a plot where they first start as enemies. Batman might see the Hulk as a dangerous uncontrollable force, while Banner might see Batman as a self - appointed judge. But as the story progresses, they realize they have more in common than they thought. They both have a dark side to them, Batman with his brooding nature and Banner with his inner struggle against the Hulk. Their journey from enmity to alliance could be a great story.