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'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.
The 'angel' is probably a character in the story. It could be a girl who is kind - hearted and gentle, like an angel, and has a passion for reading light novels.
Well, this novel might focus on a person who lives next door and has some angel - like qualities. It could be about how this person affects the life of the protagonist. For example, they might bring warmth, hope, and positive changes to the protagonist's rather dull or difficult life. There could be various events and challenges that test their relationship and how they overcome them together.