Who would be the most interesting character pairings in a Fairy Tail and Ben 10 crossover fanfiction?

Wanda Maximoff and Juvia would be a fascinating pairing. Wanda's powerful magic and Juvia's water - based magic could create some really unique and powerful combinations. Also, their different personalities - Wanda's more brooding and Juvia's more love - struck - would make for some interesting interactions.

Goku and Natsu would be an interesting pairing. Natsu is all about passion and brute strength in his use of fire magic, and Goku has his Saiyan power and love for a good fight. They could have some epic battles together, like sparring to see who's stronger, and also team up to take on tough enemies. They both have a bit of a reckless streak too.

Gray and Weiss could also make a great pair. Gray with his ice - make magic and Weiss with her ice - based semblance could have some really cool interactions. They could compare and contrast their ice powers, and perhaps even combine them in some creative ways during battles. Plus, their personalities are quite different which would lead to some interesting character development moments.

Reborn and Erza. Reborn is a strict and highly skilled hitman - turned - tutor, and Erza is a powerful and disciplined mage. They could have some intense training sessions together. Reborn might be impressed by Erza's combat skills and her ability to lead in battle, and Erza could be intrigued by Reborn's unique teaching methods and his vast knowledge of combat and strategy.

Naruto and Natsu would be a really interesting pairing. Both are hot - headed, determined, and have a strong sense of justice. They would probably start off butting heads but then realize they have a common goal and work well together. Their powers are also quite different, with Naruto's ninjutsu and Natsu's fire dragon slayer magic, so they could combine their attacks in creative ways.

I think Naruto and Lucy would be really interesting. Naruto's brash and determined nature combined with Lucy's more level - headed and strategic thinking could lead to some great interactions. Also, Naruto might be fascinated by Lucy's celestial spirits.

A pairing between Sakura and Erza would be great. Erza is a strong and disciplined warrior in Fairy Tail, and Sakura has her own strength and tenacity. They could train together and learn from each other's combat styles. Maybe they would compete in friendly sparring matches, which would not only improve their skills but also strengthen their friendship in the process.

I think Ciel and Lucy would make an interesting pairing. Ciel is this dark, brooding, and calculating character, while Lucy is more of an emotional and warm - hearted person. Their interactions could be really fun to explore, like when Lucy tries to get Ciel to open up more. Another great pairing could be Sebastian and Erza. Sebastian is a powerful demon with his own agenda, and Erza is a strong and no - nonsense mage. They would probably have some intense battles of wills and skills.

Natsu and Shiki would make an interesting pairing. Natsu is all about brute force and his dragon slayer magic, while Shiki has his gravity powers. They could have some epic battles together against powerful foes, and also learn from each other's determination and will to protect their friends. Their different personalities, Natsu's hot - headedness and Shiki's more laid - back nature, would create some great comical and tense moments.

Robin and Gray would be a fascinating pairing. Robin's calm and intellectual demeanor paired with Gray's cool and often comical personality would create an interesting dynamic. Robin could be interested in Gray's ice - make magic and how it works, while Gray could be intrigued by Robin's Devil Fruit powers and her knowledge of ancient texts. Another great pairing could be Chopper and Happy. Chopper's medical skills and cute appearance along with Happy's flying ability and positive attitude would make for some really heartwarming and useful interactions.