Perhaps there is a sidekick or a group of allies that the protagonist gathers along the way. They could be from different backgrounds, some might be intrigued by the modern weapons and want to learn more, while others might initially be skeptical or even hostile but later come around. This diversity of characters can add depth to the story.
It's also possible that there are antagonists in the story. These could be people who see the protagonist's modern weapons as a threat to their power or way of life in the other world. Their actions and motives can drive the conflict and plot forward in the web novel.
I'm not sure exactly who the main characters are without reading the novel in detail. But it's likely that the protagonist is the one who has access to the modern weapons cheat. There may also be characters who are native to the other world, such as powerful wizards or warriors who interact with the protagonist in various ways.
One interesting aspect could be the unique concept of bringing modern weapons into a fantasy world. It likely creates a lot of unexpected situations and power imbalances. For example, a simple handgun might be seen as a powerful and mysterious weapon in a world of swords and magic.
I'm not sure specifically as I haven't read the novel in detail, but usually in such stories, there is a protagonist who gets the cheat skill. There might also be friends or allies they make in the other world, and perhaps antagonists who oppose them because of their new - found power.
There are often side characters like the mentor figure. This could be someone who has some knowledge about the cheat skill or the other world in general. They guide the main character, at least in the beginning, and help them understand the implications and potential of the cheat skill. Then there are the friends or allies that the main character makes along the way. They might have their own unique abilities and personalities that complement the main character's cheat skill.
There may be other supporting characters as well, such as suppliers who provide the ingredients for the restaurant. They might be normal humans or have some connection to the otherworldly elements. Their presence adds more depth to the story by showing how the restaurant functions in both the normal and otherworldly contexts.
There's Touya Mochizuki, of course. Then there are the various female characters who play important roles in the story. For instance, Yumina Urnea Belfast, a princess who becomes an important part of Touya's life in the other world. There are also other characters like Leen, a magician, and Elze Silhoueska, a swordswoman, who all interact with Touya and contribute to the story.
I'm not entirely sure without reading the novel, but likely the main character is the veterinarian. There may also be some interesting side characters like the locals in the other world who help or hinder the veterinarian's work.
There might also be side characters. Some side characters could be friends or allies of the protagonist. They might rely on the protagonist's cheat skill at times, or they could have their own unique abilities that complement the protagonist's. For example, a side character could be a great healer while the protagonist is more focused on combat with their cheat skill.
The protagonist is usually a young person, often male. He is the one with the cheat ability. There are also wise old mentors. They guide the protagonist in understanding and using their powers. And then there are the villains. They are powerful and oppose the protagonist, trying to stop him from achieving his goals.
The main character is the skeleton knight himself. His identity as a gamer from another world is a big part of his character. There are also other characters like the various villagers he meets, some of whom become his friends or allies, and the different races' representatives such as elves and dwarves that he interacts with during his adventures.
The main character is Touya Mochizuki. He is the one who gets reincarnated into the new world with his smartphone.