I'm not sure exactly as I haven't read the whole novel, but usually in this kind of story, there's the protagonist who gets transported. They are likely to be someone with a distinct personality, perhaps kind - hearted if the title emphasizes 'good'.
There might also be a mentor - like character in the other world who helps the main character understand the new world they are in. This character could be an old wizard or a noble with a lot of knowledge about the other world's secrets.
A really interesting one is 'Re:Zero − Starting Life in Another World'. It stands out for its complex plot and the unique concept of the main character dying and restarting from a certain point every time he fails. There are also emotional and character - development aspects that make it engaging.
There are often the brave and resourceful protagonists. They are the ones who get transported with the aincard and have to find their way in the new world. They usually have some kind of special ability related to the aincard.
A popular one is 'Sword Art Online'. The main character Kirito gets trapped in a virtual world that feels like another reality. There are also novels like 'That Time I Got Reincarnated as a Slime' where the MC gets reborn in a different world with unique rules and creatures.
One interesting plot point could be the initial shock and confusion of the main character when transported to the other world. They have to quickly adapt to new rules, magic systems perhaps, and different cultures.
One popular type of character is the wise old wizard. He often guides the protagonist in the new fantasy world, teaching them about magic and the ways of the land. Another is the brave knight - type character who might accompany the main character on their adventures. And there's often a female elf character, known for her beauty and archery skills.
It could be a powerful wizard or sorcerer in the new world who sees Ichigo as a threat to his rule. Maybe Ichigo's presence disrupts the balance of power that this antagonist has carefully maintained.
One popular type of character is the powerful mage. They can use magic to solve problems and defeat enemies. For example, a character like Alice in some novels, who can cast powerful fire spells. Another is the fearless warrior. These characters are strong in combat and are often the ones leading the charge in battles. Then there are the clever rogues. They can steal, sneak around, and gather information, like Tom in a few stories.
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.