This master's thesis investigates the transmediations of Astrid Lindgren's Ronja the Robber's Daughter into a feature film by Tage Danielsson and an anime by Goro Miyazaki. Drawing on intermedial theory and analytical method, the analysis explores how the creatures called “murktrolls” and Ronja’s “scream of spring” are portrayed across these media adaptations. The thesis draws on Lars Elleström’s intermedial concepts, specifically the concept of “media transformation”. The analysis reveals how Danielsson condenses the presence of murktrolls, replacing them with “rumphumbs” and “grey dwarfs”, whereas Miyazaki expands the depiction of these mythical creatures. Both adaptations extend the significance of the “scream of spring”. The analysis can point towards a connection between murktrolls and the scream of spring, symbolizing themes of life, identity quest, and inspiration. Ilon Wikland's illustrations serve as pivotal source material, influencing the transmediations. In sum, the study highlights the dynamic interaction between the source and target media products. Kondo's anime images are notably grounded in Wikland's illustrations. By publishing the novel with these new images, that is adding a new version of the novel, the work is enriched, deepening the connection between the anime and the novel. There is also an interaction between the anime and the feature film; many details are transferred from the film to the anime. The thesis demonstrates that each transmediation shapes the overall understanding of the work by accentuating specific details from the novel. The anime and feature film, along with each reading of the novel, collectively reconstruct the narrative. These findings underscore the significance of transmediation, drawing attention to essential themes within the novel.