I'm not entirely sure, but it could be a young boy. In many stories set in natural settings like by a river, a young protagonist often plays a central role.
I'm not sure specifically as I haven't read the novel in detail. But usually in such novels, there is a central protagonist, probably a young person, who is at the heart of the story. There may also be family members like a father or mother who play important roles in the protagonist's life.
I think it may be centered around the beauty of nature and how it affects a person's life. In 'Green Days by the River Story', the river setting could play a crucial role in shaping the characters' experiences and their growth, which makes the theme related to the impact of nature on human life.
Another possible theme is community. The setting by the river might imply a small community where people interact, support, or conflict with each other, and through these relationships, the story unfolds and the characters develop.
I don't know the main characters in it as I haven't had the chance to read it. They could be locals from the area around the Green River.
Not having read the novel makes it difficult to be certain. However, based on the title, 'Days by the River', it might deal with themes of tranquility and the relationship between humans and nature. The river could represent a constant in the characters' lives, and the days could signify the passage of time and the events that unfold over time. It could also explore themes of self - discovery, as being by the river might be a place for the characters to reflect on themselves and their place in the world.
I'm not familiar with the '91 days story' specifically, so I can't name the main characters. However, they might be individuals with different personalities and goals. There could be a protagonist who drives the story forward, and perhaps some supporting characters like friends, family, or colleagues who interact with the main character during the 91 days.
There are several main characters in the '19 days story'. For example, Jian Yi and Zhan Zheng Xi are among the important ones.
I'm not sure as the story isn't described fully, but it could be fishermen, boatmen, or families living on the riverbanks.
I'm not sure specifically as I haven't read the exact 'Children of the River Story', but usually in such a story, the children themselves would be the main characters. There might also be some adults like their parents or guardians who play important roles.
In 'Kagerou Days Story', one of the main characters is Shintaro. He is a NEET type of character at the start but his life changes drastically. Kido is another key character. She is strong - willed and her power is significant in the group. Kano is a rather mysterious character. His actions and true nature are slowly revealed throughout the story. And Marry, she has a unique connection to the strange events in the story. All these characters together create the rich tapestry of the 'Kagerou Days Story'.