In addition, there may be some side characters who are initially skeptical about the main character and the Naruto system but later come to support or be influenced by them. These characters can add depth and variety to the story, showing different reactions to the new and strange Naruto system in their world.
There could also be characters in the new world who act as friends or foes to the main character. Maybe there's a wise old man in the new world who becomes a mentor - not in the Naruto - style but still gives useful advice. And of course, there might be antagonists who oppose the main character's rise with the Naruto system, perhaps fearing the change it brings.
There might be a mentor - like character. This could be an old and wise cook or a magical being who has extensive knowledge about the rare and special foods in the different worlds. They would guide the main character on their journey to discover new ingredients and recipes. And there could also be antagonists, perhaps those who hoard the rare ingredients or try to stop the main character from spreading the knowledge of certain powerful foods.
Naruto Uzumaki is a main character. He is a young ninja with big dreams. Sasuke Uchiha is another important one. He has his own dark past and complex personality.
I'm not sure specifically, but it could be the pharmacist who runs the different - world pharmacy. He or she would likely be the central character driving the story.
I don't know as I haven't read it. But usually in these types of novels, there is a main character who is the one that trips into the different world. There might also be some supporting characters in the new world like a wise old wizard or a friendly beast that helps the main character.
In many 'gourmet in a different world light novel' stories, the main character is someone who is passionate about food. They might be a professional chef in their original world or just an enthusiastic amateur. Alongside them, there could be a guide - like a native of the different world who knows the ins and outs of the local food scene. There may also be rivals or friends who join the main character on their culinary adventures in the different world.
Without more details about the particular 'lonely attack on the different world novel', it's impossible to accurately name the main characters. But in general, the main character might be someone who has been somehow separated from their normal life and thrown into this different world. They could be a loner type, someone who is used to relying on themselves. There might also be other characters like a guide figure who appears later to help the main character navigate the new world, or an antagonist who tries to stop the main character's 'attack' or progress in the different world.
There could be a group of characters. One might be a creative type, like an artist or a writer, who is constantly inspired by the new and strange things in the different world. Another could be a bit of a loner, but they slowly open up as they experience the unique charm of the different world. And there could be a character who has a special ability that helps them navigate and understand the different world better, and together they form the main characters in this 'chillin different world life novel'.
Since I don't know the details of this novel, I can't say for sure who the main characters are. But it's likely that there's the karate - practicing character who is the protagonist.
In some 'working in a different world light novels', there are also characters that are native to the different world. They could be friends or allies of the main character, or they could initially be suspicious of this outsider who has entered their world. Their cultures and values would be different from the main character's original world, which would lead to interesting interactions.
Touya Mochizuki is the central figure. He's a likable protagonist who uses his wits and the functions of his smartphone to navigate the new world. There are also characters like Elze Silhoueska and Linze Silhoueska. They are sisters and become friends with Touya. They are skilled in magic and often accompany Touya on his adventures in the different world.