There might be original dog characters created just for the fanfiction. These dogs could be powerful and have unique personalities. They could interact with Naruto and the other characters in different ways. For instance, a mysterious dog that only appears during full moons and has some kind of prophetic ability.
In this 'naruto is a dog of war fanfiction', it could be that Naruto is transformed into a dog - like form and uses his newfound abilities in a war. Maybe he can use his sense of smell like a dog to detect enemies, or his speed and agility are enhanced in a way that is similar to a dog's. And his loyalty, which is often associated with dogs, could play a big role in the war story, like being loyal to his comrades and never giving up on them.
The nin dog could change Naruto's life by making him more responsible. Since he has to take care of the dog, he'll have to think about someone else's needs. For example, he'll need to make sure the dog is fed, trained, and healthy. This will give him a new sense of purpose outside of his normal ninja training and goals.
The dog collar can be a plot device. If it has special powers, it can change the course of battles. For example, if it can create force fields, it can protect the dog and its owner from enemy attacks.
Another idea for a Naruto dog fanfiction is a story where Naruto finds an injured stray dog. He takes it in and nurses it back to health. The dog then turns out to have a unique connection to the Nine - Tails, which creates all sorts of interesting plot twists and interactions.
One common theme is friendship. Just like in their original series, characters from 'Dog Days' and 'Naruto' often form bonds in the fanfiction. Another theme could be power - up. For instance, a character from 'Dog Days' might gain some of the ninja powers from 'Naruto' and vice - versa.
Adventure is also a very common theme. In these fanfictions, Naruto usually embarks on some sort of journey in the Dog Days world. This could involve exploring new lands, facing new enemies, or uncovering secrets. Another theme is friendship. Naruto is known for his ability to make friends, and in the Dog Days setting, he often forms new and unlikely friendships with characters from that world, which then help him in his adventures.
Obviously Naruto would be one of the main characters. Since it's based on Naruto, he would be central to the story even in this dog - of - war scenario.
It could be a stray dog that a character adopts. Maybe Naruto himself finds a small, injured dog on one of his missions. He takes it in and nurses it back to health. This dog then becomes a symbol of hope and kindness in the village. It could also play a role in helping Naruto deal with his own loneliness, as the dog would be a constant and loyal companion.
One theme could be about acceptance. The dog might be different in some way, and Naruto has to accept it. And also, the lemon could represent something that is unique and valuable in their world, so the theme of value could be there too. For example, it could be a valuable item that everyone is after, and Naruto and the dog have to protect it.