Like most fantastical isekai series, Mushoku Tensei features an expansive world with characters that each impact the story in their own way, assisting Rudeus Greyrat on his journey through a new world. While Rudeus and other main supporting characters, like Eris and Sylphiette, bask in the limelight, there are a lot of characters with similar impact whose contributions and backstories enhance the depth of the story and help further it.