Another possible main character could be Kakashi. He's an experienced ninja and a mentor figure. He could be involved in guiding Naruto and others in the process of house calls, or he might be the one who assigns the house call tasks. His wisdom and combat skills could also come in handy during any unexpected situations that might arise during these house calls.
There could also be some of Naruto's friends like Sakura. She is a medic - ninja, so in the context of house calls, she would be a very relevant character. She might be the one actually making the house calls while Naruto helps in some other way, like providing security or just moral support.
Well, in addition to Kakashi and Sakura, there might be other characters making brief appearances. For instance, Naruto could pop in for a short visit while Kakashi is there. Or maybe Tsunade could be mentioned, as Sakura's mentor, in relation to her current situation that led to Kakashi's house call. But at its core, it's about Kakashi and Sakura and their interaction.
There's no definite answer as it depends on the writer's creativity. But it could be that the main characters are a mix of the most popular characters from both Naruto and House MD. For instance, Tsunade from Naruto could be a visiting doctor in House MD's hospital, and she clashes with House over different medical philosophies. And then there could be Foreman from House MD who is fascinated by the ninja skills of the Naruto characters and tries to incorporate them into his medical practice in some strange way.
There could also be original characters created specifically for the 'naruto hollow house fanfiction'. These characters could be the guides or the antagonists within the hollow house. They might have unique abilities that are tied to the nature of the hollow house, like being able to control the illusions or the very fabric of the house itself.
Well, in 'house calls naruto fanfiction', one interesting aspect could be the unique character interactions. For example, seeing how Naruto interacts with characters in a more domestic or personal setting, like when a healer makes house calls. It can show a different side of the characters that we might not see in the original series.
Another option could be Naruto and Luna. Luna is all about music and Naruto is about ninjutsu. But they could bond over their passion for their respective crafts. They might find that they have a lot in common in terms of determination and drive. And together, they could face any challenges that come their way in this fanfiction world.
In addition to Luffy and Garp, other characters could also play important roles. For example, some of Luffy's crewmates like Zoro or Nami might be present when Luffy calls Garp. They could add their own perspectives and reactions. Also, there could be some marines around Garp when he receives the call, and their reactions to Garp's decision to go to Luffy could also be part of the story.
Obviously, Izuku and Aizawa are the main characters. Izuku is the one who is doing the calling out, and Aizawa is the one being called out.
The main characters are clearly Harley and Peter. Harley is the one making the call, and Peter is the recipient of the call. They are likely to be students in the same class or school.
Naruto himself is often very popular in these fanfictions. After all, it's his house. Writers love to explore his daily life in the house and his interactions with friends and family there.
Obviously, Harry Potter and Severus Snape are the main characters. Harry, the young wizard with a heart of gold and a thirst for justice. And Severus, the complex and often misunderstood character with his deep knowledge of magic and his own hidden motives.