The anime "Huckleberry Finn Monogatari" features characters from Mark Twain's original novel, including Huckleberry Finn, Jim, Tom Sawyer, Pap Finn, and Widow Douglas. Production details, plot points, and specific alterations from the source material are documented, such as Jim being depicted as the same age as Huck and Tom. Voice acting credits and character lists for the anime exclusively reference established figures from Twain's work. No character named "Sam" appears in any context within the anime series, its episodes, films, OVAs, or spin-offs.