Well, a common name could be a 'teaching tale'. Such stories are crafted to impart knowledge or skills in an engaging way. They might have moral lessons or practical instructions embedded within them.
I'm not sure as I haven't read it specifically. But generally, a 'regressor' in novel terms might imply a character who goes back in time or reverts to a previous state. So perhaps this novel is about a character who is not such a regressor and has a different kind of story, like a forward - moving adventure or a story based on present - day challenges.
I'm not entirely sure as there could be many different 'past life regressor' novels. Generally, it might be about a character who can regress to their past lives and experiences things over again, perhaps to correct mistakes or gain some sort of power or knowledge.
Well, first, build interesting characters with depth and growth. Also, pay attention to the pacing of the story. Don't rush or drag it out. Another key aspect is world-building - make the fictional world vivid and immersive.
I'm not entirely sure as I haven't read it in full. But generally, a 'past life regressor' type of light novel might be about a character who somehow regresses to their past life. It could involve things like using knowledge from the present life in the past life to change events, gain power, or solve mysteries.
In a 'past life regressor novel', the main character is, of course, the one who can regress to past lives. This character is usually on a quest of some sort. There could also be a love interest, someone who has a connection to the regressor's past and present lives. And then there might be an enemy, perhaps someone who fears what the regressor might change in the past that could affect the present or future. For example, in some novels, there could be a powerful wizard or a corrupt noble who wants to keep the status quo and thus tries to stop the regressor.
Power and growth are also significant themes. The main character has to gain power to change the fate of the fallen family. There's also the theme of facing challenges. He has to deal with various obstacles in his regressed journey, which shows his struggle and the will to overcome difficulties.
I don't know specifically since I haven't read this light novel. But typically, there would be the main character who is the past life regressor. There might also be characters from their past life like friends, family, or foes that they interact with during their regression.