Ryubei Sonozaki

is one of the main antagonists of Kamen Rider W. He was the patriarch of the Sonozaki Family and the leader of Museum who transformed into the .
==History==
===Background===
Ryubee Sonozaki was an archaeologist who bought the grounds his estate was built on after finding deposits of fossils and relics that eventually form the collection in the Futo Museum. Sometime after his marriage Fumine Sonozaki and the births of his children Saeko Sonozaki, Wakana Sonozaki, and Raito Sonozaki, he found the consciousness of the planet Earth, which he dubbed the "True Gaia Memory". However when his son Raito fell into it and somehow survived, Ryubee began orchestrating the Gaia Impact plan and used the Evil Tail charm he acquired overseas as a means to overcome the fear that would go with sacrificing his own family to achieve it. As a result, Ryubee went mad and saw the entire city of Futo as his kingdom, refusing to let his vision of it be ruined, even by his own family. 
===The Gaia Impact Plan===
Although today he spends most of his time inside the manor, rarely getting involved in Dopant crime waves, he will appear as the Terror Dopant when necessary regarding Museum affairs. When the Gaia Impact plan commenced knowing that his own family will be sacrificed, he apologized to them, but his wife Fumine escaped and told their son, Raito, who now went under the name Philip. He ultimately found Raito once again and attempted to sacrifice him, but it failed thanks to the interference of Shotaro Hidari and Ryu Terui, who both transformed into Kamen Riders Double and Accel to fight Ryubee as the Terror Dopant. The resulting battle had destroyed the Sonozaki estate in a large fire, to which Ryubee entered the blazing flames and burned to death, before reminiscing on and saying farewell to his family. 
==Other Events==
Ryubee is resurrected as the Terror Dopant and summoned by Frey. He appears before Makoto Fukami and Onari who are out on patrol after Freya told the Mysterious Phenomenon Institute to gather the Kamen Riders' Ghost Eyecons. Voicing his query that the Earth could have decided Makoto was one of the chosen few, Ryubee proceeds to fight the young man once he transforms into Kamen Rider Specter, engaging him in a brief skirmish before he paralyzes him by his power of inducing intense fear. However, Specter soon enough manages to overcome the terror, explaining to Ryubee that Takeru saved him from giving in to despair before, swearing that he would never give into it again for his sake and that of his sister Kanon, going on to say that anyone who would bring sorrow upon this city that Kanon loves would have to answer to him. This grants Specter a Joker Memory, from which he unseals the W Parka Ghost, creating the W Ghost Eyecon which he uses to assume Double Damashii, granting him the power of Kamen Rider Double and allowing him to turn the tide against and quickly destroy the Terror Dopant, who notes that he shall return to his family now that he has died again. 
Ultimately, it was revealed that Ryubee and the other past enemies were brought back in order for the Kamen Riders to gather the Kamen Rider Ghost Eyecons so they could defeat the monster Xibalba, as Frey and Freya secretly planned together. 
==Other Appearances==
===Music video===
In the music video for "Nobody's Perfect", the Terror Dopant make a cameo as he fights Kamen Rider Skull.
===OOO, Den-O, All Riders: Let's Go Kamen Riders===
During the events of OOO, Den-O, All Riders: Let's Go Kamen Riders, Terror Dopant appears to be a member and leader of Shocker in normal timeline.
===Dummy Inhumanoid===
A copy of the Terror Dopant was one of eight Dummy Inhumanoids, a breed of recreated monsters created by Lem Kannagi of Foundation X, composed of the Museum Dopants and the four main Greeed. The dummy Terror Dopant was fought by Kamen Rider Stronger, who destroyed it with his Stronger Electro Kick.
===Kamen Rider Build: Be The One===
In an event witnessed by Sento Kiryu, a Terror Dopant is seen fighting Kamen Rider Den-O Sword Form and was among numerous monsters whom engaged the first 18 Heisei Riders before being wiped out by the Vortex Time Break of Kamen Rider Zi-O BuildArmor. 
==Personality==
Ryubee was at first a responsible and caring father figure toward his family but after Raito died and using the Evil Tail, Ryubee grew mad thinking only about his plans of the Gaia Impact regardless of the dangers on the people of Futo including the Dopants (who he sees them as research specimens) and his own family (appearing to be protective of it while he really has no qualms about using his son and youngest daughter). He does not seem to consider the Kamen Riders a threat to his plans, instead using the data off of them as a means to perfect his plans for Wakana before turning his attention to regain Philip and complete his plan to initiate the Gaia Impact. The only living thing that Ryubee appeared to care about at all is his cat Mick. It was later deduced by Shotaro however, that Ryubee still had some of his humanity intact and did care about his family which he tried to hide with the Evil Tail. When he is defeated and the Gaia Impact somewhat fails, he starts to remember who he was and remembered the better times with his family.
==Terror Dopant==
==In other media==
*In the music video for "Nobody's Perfect", the Terror Dopant make a cameo as he fights Kamen Rider Skull and was driven away.
==Behind the Scenes==
===Concept Art===
Terror Dopant was designed by .
Terror Dopant concept art.jpg|Terror Dopant concept art
Terror Dragon concept art.jpg|Terror Dragon concept art
==Appearances==
Category:Deceased
Category:W Characters
Category:Museum
Category:Dopant users
Category:Kamen Rider W
Category:Leader
Category:Evil turns good