Summary
Roselle Gustav is a Transmigrator originating from the modern era who walks the Savant pathway. His arrival occurred in the year 1143, placing him over two centuries ahead of Klein Moretti. Roselle played a pivotal role in introducing numerous proverbs, works of literature, and technological advancements to his new world. He stands as a primary source of knowledge for Klein, who relies heavily on Roselle's diary entries to understand the intricacies of the world he has transmigrated into.
