Since I haven't read it, I can't say for sure. But I assume the main characters would be the couple who live next door.
I'm not sure exactly who the main characters are without reading the novel. But it's likely to be the person who is considered the 'angel' and the one who notices this 'angel' quality, probably the neighbor or someone close to the so - called angel.
I don't know as I haven't read it. Maybe it's the parents and children in the family next door.
I'm not sure exactly as I haven't read it. But generally, it might be about the relationship, daily life or some sort of events involving the couple who live next door.
It depends on how you define noir fiction. 'The Couple Next Door' might have some noir elements like suspense and morally ambiguous characters, but it might not fit the classic noir mold completely.
Since I haven't read it in detail, I'm not sure exactly. But surely there must be the 'angel next door' character as the central figure.
The main characters are obviously Lola and the boy next door. But there might be other supporting characters like Lola's friends or family members who play important roles in the story.
I'm not sure as I haven't read it. But it could be the 'angel next door' character herself and perhaps a neighbor or someone she has a special connection with in the story.
Since it's called 'the angel next door light novel', there's probably a character who is seen as the 'angel next door'. There may also be other characters like the neighbors who interact with this 'angel' character, such as a curious child who looks up to the 'angel' or an elderly person who is helped by the 'angel' on a regular basis.
Since I haven't read it, I'm not sure. But it's likely that the angel next door is one of the main characters. There may also be a neighbor or someone who lives close by and has a relationship with the angel, like a human protagonist.
Often in novels with a king as a main focus, there will be antagonists as well. So in this 'the little king next door novel', there could be an evil wizard or a rival king who tries to undermine the little king. And on the positive side, there might be a wise old man or a brave knight who helps the little king. Without reading the novel, it's difficult to be certain about all the main characters, but these are some possibilities based on the genre.