One possible theme could be the battle between good and evil. Since there's a 'prince of darkness', it implies the presence of an opposing force of good. Another theme might be the exploration of the unknown or the supernatural, as darkness often symbolizes mystery.
Well, 'prince of darkness and other stories' is likely a collection of stories. The 'prince of darkness' in the title might refer to a character with dark or sinister qualities. Without reading it, it's hard to say more specifically about the content, but it probably contains various tales that could involve elements of mystery, horror, or the supernatural.
The stories are unique because they likely come from different individuals with their own distinct voices and experiences. Each person's 'darkness' is shaped by their personal history, so the stories will vary widely.
Perhaps it could be a corrupted version of one of the existing characters. For example, a character who has been influenced by dark magic and has turned into this 'prince of darkness'. It could be a Slytherin student who has delved too deep into the forbidden knowledge of the house and has become a dark force. Another possibility is that it's a long - lost relative of a major villain like Voldemort, carrying on his legacy in a new and terrifying way.
One of the main themes could be the exploration of the unknown. In many stories, characters face situations where they have to deal with things that are not familiar to them, just like the boy in darkness. Another theme might be self - discovery. As the characters go through their adventures, they often learn more about themselves.
The boy in darkness is probably a central figure. He might be a young boy who is facing some sort of trial or adventure in the darkness. As for the other stories, there could be various characters. Maybe an old man who imparts wisdom in one story, or a young girl who is on a quest in another. We would need to read the book to know for sure.
Kurtz is another crucial character. He is a man who has gone deep into the Congo and has been corrupted by the power and the isolation there. His actions and his final words are quite significant in understanding the story.
One of the main themes is the exploration of human nature. It shows how the darkness within people can be revealed in extreme situations like in the Congo. Another theme is imperialism. The story reflects on the negative impacts of colonial rule in Africa.
The concept of isolation is also there. Marlow in 'Heart of Darkness' is in a sense isolated during his journey. He is surrounded by a strange and often hostile environment. The other stories may explore different forms of isolation, like emotional or social isolation, and how characters deal with it.