. . "The Internal Investigation Arc is the thirteenth major story arc in Soul Eater. It is also the first story arc diverging from the anime. Although both Kid's Investigation Arc and this manga-exclusive arc focus on Joe Buttataki's arrival to Death City, Franken Stein's madness from Marie Mjolnir's implanted snake, and Black\u2606Star's self-doubt following his defeat on Lost Island."@en . . . . "Internal Investigation Arc"@en . . . . . . . . . . "The Internal Investigation Arc is the thirteenth major story arc in Soul Eater. It is also the first story arc diverging from the anime. Although both Kid's Investigation Arc and this manga-exclusive arc focus on Joe Buttataki's arrival to Death City, Franken Stein's madness from Marie Mjolnir's implanted snake, and Black\u2606Star's self-doubt following his defeat on Lost Island."@en . .