Roselle Gustav is a Transmigrator from the modern era. He follows the Savant pathway. He transmigrated in the year 1143, over two hundred years before Klein Moretti. Roselle was responsible for bringing over a lot of proverbs, literature, and advancements in technology. He is a major source of knowledge and help for Klein who uses Roselle's diary entries to learn more about the world he has transmigrated in.
Content compiled by AnimeList.moe from publicly available sources.
