I don't know as the information given is too scarce. It could be a young adventurer, a wizard, or just an ordinary person living in the shadow of the emerald city.
There's no way to tell for sure who the main characters are. However, in a typical short story set in an emerald city, we might expect to see a character who is an outsider looking in. This could be a curious journalist or a nomad. There could also be a powerful figure within the city, like a mayor or a sorcerer who controls the emerald - related magic or resources. And perhaps there's a sidekick character, someone who accompanies the main character through their adventures in the city.
Since we have no details about the story, the main characters could be various. It might be a group of friends who decide to explore the emerald city. One could be the brave leader, another the smart one who figures out the city's secrets, and a third could be the comic relief. Or it could be a single character, like a lost traveler who finds themselves in this strange emerald city and has to interact with the local inhabitants, who could also be considered main characters in the story as they shape the traveler's journey.
Often, in the Emerald City short story, there is a protagonist who is attracted to the city for a particular purpose. This could be a young adventurer seeking fortune or a lost soul looking for answers. Sometimes, there are supporting characters such as the wise old man or woman who gives advice on how to reach the city or what to expect once there. There may also be antagonists, like the witch who tries to stop the main character from getting to the Emerald City.
There could be a group of characters. For instance, there might be a wise old guide who has some knowledge about the location of the Emerald City. And then there could be a couple of friends or companions who join the main character on the journey. They each might have their own reasons for wanting to find the Emerald City, like one could be seeking wealth, another could be looking for a place to belong.
I'm not sure specifically as I haven't read the exact story, but likely there are characters who are either native to the emerald city or have come to the city with certain hopes and dreams.
I'm not sure specifically as it depends on the particular version of the Emerald City Story. But it could have a brave adventurer as a main character, someone who is drawn to the allure of the Emerald City.
The 'emerald city book short story' could potentially revolve around a city made of emerald. It may tell the story of a protagonist who stumbles upon this city. Maybe there are challenges they face within the city, like dealing with the envy of others because of the city's wealth or trying to solve the mystery of how the city came to be made of emerald.
Maybe there is a young protagonist who is on a quest in 'emerald city and other stories'. This young person could be curious and eager to learn about the world outside their own. Their journey to the Emerald City and the experiences they have there, along with the people they meet, could form the main plot of the story. They might face difficulties and grow as a character throughout their time in the city and its surrounding areas.
There could be a group of merchants in Emerald City Stories. They play an important role as they trade goods, and might get involved in all sorts of plots and adventures related to the valuable emeralds in the city. There could also be a city guard who is tasked with keeping the peace but often gets caught up in the more mysterious happenings in the city.
The main theme could be the journey of self - discovery. The characters in the story might be in search of something more than just the physical Emerald City, perhaps a deeper meaning in their lives or a better version of themselves.
The main theme could be about the melancholy or blues associated with the emerald city. Maybe it's about the characters' unfulfilled dreams or their sense of alienation in that city.
Since it's related to the Oz series, it's likely that Dorothy could be one of the main characters. She's the one who usually gets into all kinds of adventures in Oz. The Wizard of Oz himself might also be a key character, as the Emerald City is his domain. And perhaps some of the native Oz characters like Glinda the Good Witch could also play major roles in the story of this graphic novel. They would all interact within the setting of the Emerald City, bringing their own personalities and goals to the plot.