"Mythical Detective Loki Ragnarok" is a Japanese manga series created by Yoshiyuki Nishi. It follows the adventures of Loki, the Norse god of mischief, who works as a detective in a world filled with mythical beings. The story combines elements of mystery and fantasy, showcasing Loki's cleverness as he solves various cases involving gods, demons, and other supernatural entities. The series features a diverse cast of characters, including Fenrir, a wolf-like creature, and Hela, the goddess of death. As Loki navigates through different challenges, the narrative explores themes of friendship, loyalty, and the complexities of mythological lore.