Perhaps a young and rebellious kung fu prodigy. This character might be initially reluctant to teach Naruto but is eventually won over by Naruto's tenacity. They would have a more dynamic relationship, with the young master constantly challenging Naruto to think outside the box and Naruto in turn teaching the master about the ninja way.
Power and its proper use can also be a theme. Naruto has a great deal of power, and Fu has her own abilities. Fanfictions might explore how they use their powers in different situations, whether it's for the greater good or for personal reasons. They can also learn from each other about the responsibility that comes with power.
One unique aspect is the exploration of cross - village relationships. Since Naruto is from Konoha and Fu is from another village, it shows how two ninjas from different backgrounds can interact and form a connection.
A fanfic could focus on a character from Kung Fu Panda learning ninjutsu from Naruto. Po, for instance, could be intrigued by Naruto's ability to create clones and try to incorporate that into his own fighting style. This would lead to some really interesting training sequences and battles.
One idea could be that Naruto is transported to the Kung Fu Panda universe. He teams up with Po and learns some of the unique kung fu styles there. He could also share his ninja skills with the Furious Five, creating a new kind of fighting synergy.
One interesting Kung Fu Naruto fanfiction could be where Naruto learns Kung Fu from a mysterious traveler in the Land of Fire. This new skill gives him an edge in battles, allowing him to combine his chakra with Kung Fu moves for unique attacks.
One idea could be a story where Naruto is transported to the world of Kung Fu Panda. He meets Po and they train together. Naruto could learn some of the unique Kung Fu techniques while also teaching Po about his ninja skills like shadow clones.
Another concept is that the spirit animals in the Kung Fu Panda world are somehow related to the tailed beasts in Naruto. For example, Po discovers that he has a connection to the Nine - Tailed Fox within Naruto. They have to work together to balance the power of these spirits and beasts to prevent chaos in both universes. This could involve a lot of training sequences where they learn from each other's combat styles and philosophies.
Well, Naruto is the central male figure. He has his orange jumpsuit and his dream of becoming Hokage. Fu, on the other hand, is a key female character. She has her own set of skills and a personality that makes her stand out. In a harem fanfiction, Naruto is surrounded by characters like Fu, and there could be other female characters from the Naruto universe that might be added to the mix, like maybe some of the kunoichi from Konoha or other villages who get involved with Naruto's story in this particular fanfiction.
The combination of Naruto's universe and kung fu is what makes it unique. Naruto already has its own set of combat styles like ninjutsu, but adding kung fu gives a fresh take. It allows for new battle scenarios and character interactions.