Kirihiko Sudo, later named Kirihiko Sonozaki, is a Gaia Memory Distributor for Museum as well as the husband of Saeko Sonozaki and a major antagonist in the first arc of Kamen Rider W.


An employee of Museum, Kirihiko was given a Gaia Driver and the gold Nasca Memory to become the Nasca Dopant. He also became engaged to Saeko Sonozaki and assisted her in her job of dealing Gaia Memories while using the Digal Corporation as a front.

Sudo oversaw the distribution of Gaia Memories and fought Double whenever he interfered, coming to see him as a rival. However, after learning of the true goals Museum from Ryubee Sonozaki, Kirihiko defects from Museum and helps Double defeat the Bird Dopant. He attempts to convince Saeko to leave with him but instead she kills him and snatches the Nasca Memory.

Kirihiko's death would later spur his sister Yukie Sudo to come seek revenge on his murderer.


           W Title.pngVillains

Museum/Sonozaki Family
Ryubee Sonozaki | Saeko Sonozaki | Wakana Sonozaki | Kirihiko Sudo | Mick | Shinkuro Isaka | Masquerade Dopants

Foundation X
Neon Ulsland | Jun Kazu | Tabata | Doctor Prospect | Lloyd | Shion

Katsumi Daido | Jun Kazu | Maria S. Cranberry | Kyosui Izumi | Reika Hanehara | Ken Ashihara | Gozo Domoto

Shiro Endo | Energy

Magma Dopant | T-Rex Dopant | Money Dopant | Anomalocaris Dopant | Cockroach Dopant | Sweets Dopant | Virus Dopant | Violence Dopant | Masquerade Dopants | Arms Dopant | Bird Dopant | Ice Age Dopant | Triceratops Dopant | Liar Dopant | Dummy Dopant | Puppeteer Dopant | Invisible Dopant | Nightmare Dopant | Beast Dopant | Zone Dopant | Yesterday Dopant | Quetzalcoatlus Dopant | Hopper Dopant | Gene Dopant | Jewel Dopant | Old Dopant | Energy Dopant | Oyakodon Dopant | Bat Dopant | Spider Dopant | Commander Dopant | Death Dopant

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