no it says in the first chapter ''in truth im trapped inside a novel i wrote myself'' her just being in the book and interacting with the characters and them all taking an interest in her changes the story a little. well either way the story has changed because shes in it preventing bad things from happening so she will only know the basics of the things happening now and not every detail as its changed a bit from what she wrote
Shes in the game based on the novel she wrote. She helped design it and tried it out at home but there wasnt a log out option remember? She wanted to try the harder route and clicked the peasant route instead of the aristocrat route and ended up being one of the slaves from the scenario in the beginning of the game
Chapter 1, around page 13 for those who want to look it up
http://www.mangago.zone/read-manga/i_choose_the_emperor_ending/nto/to_chapter-1/13/
Quotes directly from chapter 1
"I've always dreamed of making my worlds a reality. Until now, it only existed in the daydreams in my head....and stories I wrote in secret. But finally... I've created my world, Lasnarok!!"
Then she goes on to talk about her love for medieval things and what led her to create the book.
The MC was the chief of the vrwmm development department and the youngest head researcher. Everyone is correct. She is stuck inside the game of a novel she wrote during her days in school and shes a genius scientist hence why shes able to make all of those contraptions inside the game
Arent Rino is the author of the book???