Rudolf Elphberg is a fictional character from the popular fantasy series, The Last Unicorn by Peter S. Beagle. He is depicted as a noble and kind-hearted prince who embarks on a quest to find the last unicorn. His character embodies themes of bravery and compassion, making him a beloved figure in the story. In the narrative, Rudolf's journey is marked by encounters with various magical beings and challenges that test his resolve. His interactions with the unicorn and other characters highlight the importance of friendship and the pursuit of one's true purpose in life.