Kumo-Otoko, also known as Spider Man, ranks among the original eight demons serving the Fuujin oni. He reincarnated into a spider's body, adopting the physical form of his host, which defines his appearance and abilities. Although a demon, Kumo-Otoko favors intellectual strategies over brute force. He crafts complex plans that initially succeed due to his intelligence, but his inherently goofy nature often leads to humorous backfires, a recurring flaw in his endeavors. He becomes Takeshi Onimaru's right-hand operative, a position born from necessity rather than merit due to a lack of superior alternatives. Onimaru frequently assigns him tasks like recruiting warriors or gathering intelligence. Kumo-Otoko displays undying loyalty to Onimaru, remaining the sole demon of the original eight to support him until the very end, while others perished or defected. His commitment persists despite Onimaru's frequent mistreatment. Notably, Kumo-Otoko harbors no genuine malice toward Yaiba's group. His loyalty to Onimaru stems from a sense of duty, not ill will, setting him apart from typical antagonists as his actions align with servitude rather than personal animosity. His character role and core traits remain consistent across official media, with no significant evolution or additional background beyond these established functions and relationships.