The main characters could be the spotted cow, of course. And perhaps there are some other animals in the story that interact with the cow, like other cows or maybe a barn cat or a dog. Also, there could be a human character, such as a young child who has a special bond with the spotted cow, or an old farmer who has been taking care of the cow for a long time.
I'm not familiar with this particular short story, but I can guess. The spotted cow is bound to be a main character. In addition to that, there could be characters like the owner of the farm where the cow lives. There might also be other people or animals who play important roles, for instance, a vet who comes to check on the spotted cow if it gets sick, or a neighboring farmer who has an opinion about the spotted cow.
The plot could revolve around the unique characteristics of the spotted cow. Maybe it's a story set on a farm where the spotted cow stands out among the other animals. It could deal with how the farmers or other characters interact with this special cow, like taking care of it, or maybe there are some challenges related to the cow that need to be overcome.
The main characters are the man and the cow. In this story, the man might represent humanity with all its qualities like intelligence, ambition and sometimes greed. The cow, on the other hand, represents the simplicity and naturalness of animals. Their relationship in the story can range from one of exploitation to one of harmony, depending on how the story is told. This contrast between the two main characters makes the story interesting and thought - provoking.
In the 'first cow story', it's possible that there is a protagonist who discovers or acquires the first cow. This person would be a main character. There might also be other people in the community who interact with this person and the cow, such as a local merchant who wants to buy the cow's products, or a neighbor who is jealous of the cow. All these could potentially be main characters depending on how the story is developed.
Maybe there are sisters who are cow girls. One could be more adventurous and always eager to explore new parts of the ranch, while the other is more cautious and focuses on the well - being of the cows. There might also be an older, more experienced cow girl who acts as a mentor to the younger ones, teaching them the ropes of ranch life.
Since I don't know the exact 'the cow man story', it's hard to say. But likely, the cow man himself is a main character. There might also be other characters like the cows he interacts with.
In the 'the 8 cow wife story', the main character is surely the wife. There may also be a male character, perhaps her husband or father - if the eight cows are part of a dowry or bride - price situation. There could also be other family members or community members who play a role in the story, for example, those who witnessed or were involved in the transaction of the eight cows.
Obviously, the woman who gets turned into a cow is a main character. There might also be the one who causes the transformation, like a sorcerer or a magical being.
I'm not aware of the author of the 'Spotted Deer Becomes a Man' short story. It could be a relatively unknown author or a story from a specific regional or cultural folktale collection. If it's a folktale, it might not have a single named author but rather be passed down through generations orally before being written down.
I'm not sure who the main characters are as I don't have detailed information about this specific visual novel.
Obviously, the farmer and the girl are the main characters. There might also be other characters like the farmer's family who might be shocked to see a new cow in the barn and not know it was once a girl.