Sasuke and Levi. Both are extremely skilled fighters with a cold exterior. Sasuke has his Sharingan and ninja skills, and Levi is known as humanity's strongest soldier. They could have a great rivalry at first, constantly trying to outdo each other in combat. But as they face tougher enemies together, they would start to respect each other and combine their skills to defeat the common foe.
Hinata and Mikasa. Hinata is a shy but strong - willed kunoichi, and Mikasa is a fierce protector. They could bond over their loyalty to their friends and loved ones. Hinata could teach Mikasa some of her gentle - fist techniques, and Mikasa could show Hinata how to be more assertive in battle. Together, they would make a formidable team in the crossover.
Naruto and Eren would be an interesting combination. Naruto is full of optimism and determination, while Eren has a deep - seated hatred for the Titans. Their different personalities could create some great character dynamics. Naruto could inspire Eren to be more positive in his fight against the Titans, and Eren could show Naruto the harsh reality of the world he lives in.
For me, Hinata and Historia would be a great pairing. Hinata is shy but has a lot of inner strength, and Historia has had to find her own strength in a difficult world. They could share their stories of growth and self - discovery. And then there's Gaara and Reiner. Gaara was once an outcast but found his place, while Reiner is dealing with his own identity issues. They could have some deep conversations about their pasts and how they overcame their inner demons while also fighting side by side against common threats.
One possible plot could be that the ninjas from Naruto are transported to the world of Shingeki no Kyojin. Naruto and his friends could use their ninja skills to help the Scouts fight the Titans. For example, Naruto's Shadow Clone Jutsu could be used to create distractions while the Scouts attack. Sasuke could use his Sharingan to predict the Titans' movements. And Sakura could use her superhuman strength to take on the Titans directly.
A likely character pairing would be Levi Ackerman and Kakashi Hatake. Both are highly skilled and stoic characters. They could share their combat expertise and perhaps develop a mutual respect. Also, Armin Arlert and Shikamaru Nara might be paired. Armin's intelligence in strategizing against the Titans could be enhanced by Shikamaru's natural aptitude for coming up with complex plans.
Naruto and Rick would be a really interesting combination. Naruto's optimism and never - give - up attitude could inspire Rick, who has seen so much horror. And Rick's leadership skills and survival instincts could teach Naruto a thing or two about dealing with a post - apocalyptic world. They could work together to lead their respective groups and fight off the walkers and any other threats.
Naruto and Rias would be really interesting. Naruto's straightforward and determined personality combined with Rias' leadership and strategic mind could lead to some great interactions. They could learn from each other's fighting styles and ways of dealing with problems in their respective worlds.
Definitely Sakura and Sid. Sakura is a strong - willed and intelligent character. Sid is a bit of a goofball. Sakura could be constantly exasperated by Sid's antics, but at the same time, Sid could bring out a more fun - loving side of Sakura. And Sakura could use her medical ninjutsu to help Sid if he gets injured during their adventures in the Ice Age world.
I think Naruto and Alice would make a great combination. Alice can see the future, and Naruto has his ninja skills and immortality. They could team up to prevent some disasters in both worlds. Alice could foresee the problems, and Naruto could use his powers to stop them. And Naruto's immortality would give them more time to plan and execute their strategies.
I think Naruto and Manny would be an interesting combination. Manny is this big, strong mammoth, and Naruto is a skilled ninja. Their personalities are so different. Naruto is full of energy and always eager to prove himself, while Manny is more of a calm and protective leader. It would be fun to see how they interact and how Naruto's ninja skills might come in handy in the Ice Age world with Manny's brute strength.
One idea could be a crossover where Naruto characters gain the ability to transform into Titans. For example, Naruto could use his chakra to control the Titan form in a unique way.
The most unique element is often the clash of different worlds' power systems. For example, when 'Shingeki no Kyojin' crosses with 'Fullmetal Alchemist', the alchemical powers and the Titan - slaying skills create a very distinct dynamic. It's not just about who is stronger, but how these different powers can be combined or opposed.