I don't know as I haven't read it. It could be a young adventurer who stumbles upon the ghostly presence in the mythical world.
Since we don't have access to the actual story, it's difficult to say. But in a typical 'mythica a ghost story', there could be a hero or heroine who is drawn into the mystery of the ghost. There might also be characters who are related to the mythical background, like a wizard or a priestess who has some knowledge about the ghost and the world it inhabits. Additionally, there could be other supporting characters who either add to the spooky atmosphere or help the main character in their journey to understand and overcome the threat or mystery posed by the ghost.
I'm not sure specifically as there could be many interpretations. It might be about a ghostly encounter within a mythical setting. Maybe it involves a haunted place in a world full of magic and mystery.
In 'the ghost story', the main characters could be the people who encounter the ghost. Maybe a group of curious kids or a brave investigator.
As I don't know the particular '1930 ghost story', it could have a protagonist like a young journalist who is investigating the strange happenings. There might also be an old caretaker of the haunted place who has some secrets.
The main character in the Ghost of Tsushima main story is Jin Sakai, a samurai with a strong sense of duty towards his homeland. His uncle, Lord Shimura, is an important part of the story. Lord Shimura represents the traditional samurai values. Another important character is Yuna. She is a thief - turned - ally of Jin. She has her own skills and knowledge of the island which prove invaluable to Jin in his fight against the Mongols. There are also Mongol characters like Khotun Khan, who serves as the main antagonist, driving the conflict in the story.
The main character is Major Motoko Kusanagi. She is a strong and intelligent cyborg. Then there's Batou, her partner in the law enforcement agency. He is a reliable and tough character. Another important character is Aramaki, who is in a leadership position within the agency.
There might be the ghost itself as the main character. It could be the spirit of someone who had a connection to the well in the past.
Since I don't know the details of the 'ghost pony story', I can't say for sure who the main characters are. But it's likely that the ghost pony itself is one of the main characters.
It could be a group of local villagers. In some 'ghost mountain' stories, the villagers are often aware of the mountain's haunted reputation. They might be the ones trying to keep others away from the mountain, or perhaps they are the ones being affected by the strange happenings on the mountain. For example, their livestock going missing or strange noises scaring them at night.
The main character is Casper, the friendly ghost. There are also probably some humans who interact with him, like the people who enter the haunted place where he lives.
I'm not sure specifically as the name is rather general. It could have a medium as a main character, someone who can communicate with ghosts and is trying to understand their tricks.