Kumonjin (クモンジン Kumonjin?, 2): A jumping spider cyborg who was originally Specimen 105, a prideful middle aged man with a scar on his face. To test of his abilities, Kumojin captures Shinichi Takamori, an ideal candidate for the Remodelling process. He later meets Skyrider, unaware that he is an enemy, Kumojin unknowingly takes him to Shinichi. Learning too late that the Kamen Rider is his enemy, Kumojin is unable to stop him from taking his captive. The cyborg later tracks Tsukuba to kill him for his meddling before General Monster orders him.to recapture Shinichi, forced to capture his younger brother Kenji Takamori instead to hold ransom. But the scheme to capture Shinichi again fails and Kumojin is dissolved by SkyRider's SkyKick.
He was later revived as part of the Second Generation Cyborg Corps (改造人間二世部隊 Kaizō Ningen Nisei Butai?, movie). They were destroyed by the 7 Riders.