The seven men could be descendants of ancient magicians. They formed the circus as a way to hide their true identities and powers. The Artistefish might be a creation of their ancestors' magic, and they are now on a quest to understand its full potential. In the Inuyasha world, they could be drawn to certain magical artifacts or places that are related to their family's magic history, and their encounters with Inuyasha and his gang would be centered around these magical interests.
One major fact is that the events are based on real military operations. For example, the battles they fought were real historical battles. However, some of the personal relationships might be fictionalized a bit for dramatic effect. Like in the show, some conversations were created to show the camaraderie better, but not all of them actually happened as shown.
One interesting crossover could be where Inuyasha and his gang end up in the Naruto world. They might be mistaken for strange ninjas at first. Inuyasha could get into fights with some of the stronger ninja clans because of his brash nature. Another cool one would be Naruto somehow ending up in Inuyasha's feudal Japan - like world. He would have to adapt to the different fighting styles and the presence of demons.
Well, often the leader of the Band of Seven, Gantetsu, is quite popular as he has a lot of power and a mysterious air about him. His decisions drive much of the group's actions.
In Inuyasha, the members of the Gang of Seven used by Nairo included Inuyasha, Coral, Kagome, Tie Suiya, the half-demon Inuyasha's father, the human doctor, the flower demon Red Princess, and the demon Snake Bone.
Snake Bone was not the first character to appear in the gang of seven. He only appeared twice in the plot. The first time was when the Gang of Seven was betrayed by Nairo. Snakebone used himself as a vessel to seal Inuyasha and Coral in another world. The second time was when Inuyasha and the half-demon Inuyasha's father met. Snake Bone transformed into a huge snake-shaped demon and attacked Inuyasha's father.
Therefore, we are unable to determine the gender of the snake bones. He was a monster that could have a male or female form.
One idea could be exploring the backstories of each member of the Band of Seven in more detail. For example, how they came together and what their individual motives were before joining the group.
The circus could be a traveling troupe that brings new cultures and items to the different regions in the Inuyasha world. For instance, they might have strange artifacts from far - off lands that attract the attention of demons and Inuyasha's group. This would draw them into the circus's orbit and start an adventure.
The plot might involve the Artistefish being a key to opening a portal between the circus world and the Inuyasha world. The seven men, who could be skilled in magic or combat related to the circus acts, have to deal with the consequences of this portal. They might encounter Inuyasha and his friends, and either become allies or enemies depending on their motives. For instance, if they are after a powerful jewel in the Inuyasha world, they would clash with Inuyasha's group who are also protecting the jewel.
In fanfiction, Naruto might win if the story focuses on his strategic thinking and ability to quickly adapt in battle. He has fought against some extremely powerful foes in the original series and learned from each encounter. However, Inuyasha has his own set of skills and the element of surprise with his demon abilities. But overall, I think Naruto has a bit of an edge in terms of pure combat experience against a wide variety of enemies.