There are a few authors that stand out. For instance, A. M. Lark has created some great 'knm light novel' works. Her writing style is known for its vivid descriptions and engaging characters. Another author is K. P. Hill. He often writes stories with complex plots and deep themes in the 'knm light novel' genre. These authors contribute to the richness of the 'knm light novel' world with their unique creativity and storytelling abilities.
I'm not sure. It could be a blend of real and made-up. Maybe it started with a kernel of truth and then the storyteller took creative liberties to shape it into what we see.
Hard to say for sure. Sometimes movies or shows claim to be based on true events but have a lot of fictional elements mixed in. So, it could be a blend of fact and fiction in 'The Girl from Oslo'.