I'm not sure specifically which 'black box short story' you are referring to. There could be many short stories with this title or related to the concept of a black box. It might be about a mysterious object like a black box that holds secrets, or perhaps it's a story where the black box is a metaphor for something unknown in a character's life.
Since there are so many short stories in the world, it's really hard to say who wrote the 'black box short story'. It might be a new and emerging writer who is just starting to make a name for themselves. Or perhaps it was written by an author from a particular genre, like a mystery or science - fiction writer. However, without additional details, we can't accurately identify the author.
I'm not sure specifically as there could be many 'black box short stories'. It might be about a mysterious black box, perhaps something found or a situation involving it that holds secrets or unknown elements.
The main characters in the 'black box short story' really depend on the nature of the story. If it's a story about a lost civilization and the black box is a relic from that time, the main characters could be archaeologists or historians. They would be the ones trying to unlock the secrets of the black box. There might also be local guides or informants who play important roles in the story. If it's a more fantastical story, it could be a wizard or a magical being who is either protecting or seeking the black box, and there would be other characters in their world who interact with them regarding the black box.
There could be a group of characters. Maybe a scientist or an investigator who is intrigued by the black box. And there might be others around them, like friends or colleagues, who either help or hinder their exploration of the box. For example, a friend might encourage the main character to open the box while a colleague might warn against it due to potential dangers.
The main theme could be mystery. The black box often represents the unknown in stories. It might hold secrets that the characters are trying to uncover, which drives the plot forward.
Since I don't have the full text of 'the black box short story', it's hard to say precisely. However, it's common to have a central character who is affected by the presence of the black box. There could be a secondary character who is somehow related to the origin of the box, like a previous owner or a creator. And there might be a character who serves as a foil to the main character, highlighting different attitudes towards the black box.
I'm not sure as I haven't read the specific 'the little black box short story', but often in such stories, there could be a curious protagonist who is drawn to the box.