Yes, there is a Ninja Kamui manga. It has gained popularity for its action-packed scenes and interesting character developments. Many fans enjoy collecting and reading it.
I'm not sure if there is specifically a 'luka x gakupo lemon fanfic' available. Fanfics can be found on various fanfic platforms, but 'lemon' fanfics often contain inappropriate or adult - themed content which may not be allowed on many mainstream platforms.
Yes, there are many non - lemon 'gakupo x reader' fanfictions. You can look for them on popular fanfiction websites. Some authors prefer to focus on the more innocent and platonic relationships between Gakupo and the reader, creating heartwarming stories about friendship or light - hearted adventures.
Naruto using Kamui could change the power dynamics in the Naruto universe in the fanfiction. His battles would become more unpredictable. For instance, against strong opponents like Madara or Kaguya, Kamui could be used in creative ways. He could use it to send parts of their attacks to another dimension, or quickly dodge attacks and counter - attack from unexpected angles. It also might make his allies view him differently, as this new power is something very different from his normal ninjutsu.
In many fanfictions, Naruto might initially discover Kamui through an encounter with Obito or Kakashi. Maybe during a battle where he witnesses the power of Kamui first - hand, and his inquisitive nature leads him to start exploring how to learn it.