One of the main themes is identity. The boy, who is a Royal, is identified by his jacket even on the verge of death, showing how a group identity can overshadow an individual's humanity. Another theme is the senselessness of violence. His death is a result of a meaningless gang - related stabbing.
I'm not sure specifically as I haven't read this exact short story. But generally, it could be about a person who is bleeding on the sidewalk, perhaps due to an accident, a fight, or some kind of health issue. It might explore themes like vulnerability, the reactions of passers - by, or the struggle of the person in pain.
One main theme is the senselessness of violence. The young boy is stabbed just because of the gang he belongs to. Another theme is identity. The boy realizes at the end that he is more than just a 'Royal' (his gang identity), he is a person, Andy.
Since I have no information about this short story, the main characters could be diverse. Maybe there's a doctor or a nurse who happens to be passing by and tries to help the bleeding person. Or it could be a detective if the bleeding is part of a crime scene. There could also be a family member of the bleeding person who is searching for them.
The setting of the sidewalk at night creates a sense of isolation. It's a public place but at that moment, Andy is all alone, which makes the mood quite desolate.
I'm not entirely sure specifically as 'Sidewalk Stories' could refer to various things. It might be a personal anecdote someone has about the sidewalk, like a memorable encounter or an observation made while walking on the sidewalk.
The 'Secret Sidewalk Story' might be about a series of events that are not known to the general public but are associated with the sidewalk. It could be about a treasure hidden beneath the sidewalk that only a few people are aware of, and the story unfolds as different characters get closer to discovering it. For example, there could be an old map that leads to the treasure and the characters in the story follow the clues on the sidewalk.
Since we don't have the actual story, it's hard to say for sure. But it could be a young child who discovers something strange on the sidewalk and becomes the main character in the story.