In the Konosuba Eris Light Novel, apart from Eris, there are a number of significant characters. Kazuma is the central character around whom the story revolves. He has to deal with all the chaos in the new world. Aqua, a goddess who is not as competent as one might expect, is constantly getting into trouble and dragging the group along. Megumin is a very distinct character with her obsession over explosion magic. She's always eager to use it despite the potential consequences. Darkness, on the other hand, has her own set of strange behaviors with her masochistic nature. These characters together create a dynamic and hilarious group that forms the core of the story.
Well, in the Konosuba Eris Light Novel, one of the key plot points is the growth of the characters. Kazuma starts as a rather ordinary guy but gradually becomes more skilled. Eris is sometimes the catalyst for their adventures. The group has to face various challenges, from fighting powerful monsters to handling political unrest in the fantasy kingdom. And the relationships within the group, which are both hilarious and heartwarming, are also central to the plot.
The Konosuba light novel is not a fanfic. It has its own unique plot, characters, and world-building developed by the author's imagination and creativity.
The Konosuba light novel is good. It has a charming mix of fantasy elements and comedic situations that make it highly enjoyable. The character development is also well done.