Obviously, Don is one of the main characters. He is the one who has the adventures in the other world.
There might be a mentor - like character. Maybe someone who helps Don understand the new world, its magic, and how to survive. But without reading the whole novel, it's hard to say for sure who this character is exactly.
It's full of fantasy elements and unexpected plot twists. The characters are well-developed and the world-building is rich and immersive.
There could also be an antagonist. This character would oppose the protagonist's goals, whether it's to stop them from achieving something in the other world or to take over the world themselves. They add conflict and drama to the story.
I'm not sure specifically as I haven't read this exact light novel. But typically, there could be a young adventurer who stumbles upon the market. There might also be an old and wise merchant who knows all the secrets of the market.
Well, the obvious main character is the veterinarian. This person is likely to have a distinct personality, maybe they are very kind - hearted and determined to help all creatures. There may be some important magical beast characters as well. These could be a majestic dragon with an ailment that the veterinarian has to cure, which then becomes an ally. Also, there could be a local healer or shaman who at first is skeptical of the veterinarian's ways but later becomes a friend. And there might be a character from the veterinarian's original world who somehow also ends up in this other world and they have to figure out how to get back together.
In the 'Another World in a Smartphone' light novel, the main character is Touya Mochizuki. He is a typical high - school student before being sent to the other world. Once there, he uses his wits and the smartphone to make his way. There are also other characters like the various kings and queens of the different kingdoms in the new world, and the different races he meets such as elves and dwarves. They all play important roles in the story as they interact with Touya, sometimes as friends, sometimes as foes, depending on the situation.
Often in such light novels, there could be a mentor - like figure. Maybe an old cook in the other world who teaches the protagonist some local cooking techniques or gives advice on how to blend their own cooking style with the local cuisine. There could also be antagonists, perhaps other chefs who are jealous of the protagonist's rising fame.
There are also various customers from the other world. For instance, there are magical creatures like dragons or fairies. These characters play important roles as they bring different elements of the other world into the story. Their interactions with the owner and each other are what drive the plot forward. Each of them has unique requests and reactions to the food served at the restaurant.
The main character is usually a person from our world who gets transported to the other world with their smartphone. But there are often other characters in the new world that the protagonist interacts with, like local villagers, knights, or mages.
I don't know the exact main characters since I haven't read it. But they could be ordinary people who get thrown into this other world and have to adapt quickly.
Elze Silhoueska and Linze Silhoueska are twin sisters. They are adventurers and quickly become friends with Touya. Their skills in combat and magic play important roles in the various adventures that take place in the story.