Gaoh
Gaoh is the leader of a band of thieves who steal time-traveling trains. He is also a renegade Kamen Rider called
Kamen Rider Gaoh. He steals the DenLiner to obtain the GaohLiner in order to erase all time.
Kai
Kai is a Singularity Point who is the mastermind behind the Imagin attacks, psychically giving them the orders to destroy the key to the Junction Point to ensure the Imagin's future, believing it to be Sakurai at first. Just as Zeronos sacrifices memories of himself to transform, Kai can use memories of himself to sustain the Imagin. As a result, he is suffering from memory loss that would worsen in time before he suffers the same fate as the Imagin themselves. Arriving on January 10, 2007, Kai almost succeeded in killing Sakurai, but something reversed the damage he caused. Believing Den-O may have played a part in it, he gives Ryutaros a ticket to the DenLiner with the deal to kill Ryotaro, but Ryutaros's refusal to carry out the task forces Kai to reveal himself, tricking Ryutaros into sabotaging the ZeroLiner in order to get rid of the DenLiner and render the Den-O Belt useless without the Rider Pass. This plan, along with later who to convince Ryotaro not to meddle in his affairs, fails. While both Den-O and Zeronos fought the Armadillo Imagin in the past, Kai is puzzled as to why Yuto protected Ryotaro from its attacks instead of his future self. By probing Ryotaro, Kai realizes that Yuto Sakurai is not the true target of the Imagin, but Airi Nogami. Running on desperation, he summons an army of Imagin to hold off Den-O and Zeronos while he personally attempts to kill her, only to be horrified of the complexities behind her nature as he decides to devastate the entire city intstead. However, when his attack over decimated the district the climax was occurring at, Kai finally learns that the key is actually Hana (Kohana), the future Singularity Point, sicking every loyal Imagin on her with Ryotaro, Yuto and their Imagin partners holding the horde off. Ultimately, Kai fades to sand as the remainder of his memories disappears with the Death Imagin's defeat, taking all surviving Imagin with him, save for the Tarōs Imagin, Sieg, Deneb, and a few isolated cases.
He possesses a black page-a-day calendar book to choose the dates the Imagin should find ideal hosts with ideal memories to fly towards. By choosing a date on the black calendar book, Kai can act as a portal for the Imagin to go through, being able to open himself the way an Imagin would open a host once a contract is completed. Just like a host to an Imagin, the Imagin passes through Kai at the date it travels to, though the Kai at the past date, who is destroyed as the Imagin arrives at the past, worsening Kai's condition. He can also open people as well, looking into their memories at a glance for ideal moments in time for his Imagin to invade. His catchphrase after stating how he feels about something, "I have the face for it, don't I?", refers to his emotion regardless of having only an emotionless or angry expression and a remorseless childish personality.
Imagin contractors
In order for Imagin to alter the past, they must find a desperate individual in the year 2007 and open a contract with them to grant them a single wish.
Tetsuo
Tetsuo is the leader of a small gang of teenagers that Ryotaro first meets. After he and his gang had beaten Ryotaro up, he had lost a jingle-bell key holder that his mother gave him on the night she passed away. The Bat Imagin opens a contract with him to return the key holder, after which the Imagin travels back to December 24, 2004, the night of Tetsuo's mother's death. In the end, Ryotaro brings Tetsuo on to the DenLiner and took him to see his mother one last time.
Yū Yamagoshi
Yū Yamagoshi is a musician down on his luck who meets Ryotaro when he is possessed by Momotaros and beats up several Yakuza that are trying to get money back from him. He opens a contract with the Chameleon Imagin to get an amount of money "to die for." The Imagin travels back to March 15, 2006, the day that Yamagoshi lost a record contract deal because he saved a small girl. Although, Hana is able to take over taking care of the little girl so Yamagoshi can make it to his audition on time, he is still unsuccessful to get a record deal; however, despite that he continues to dream as he now chooses to become a street musician and earn money honestly.
Daiki Saitō
Daiki Saitō is a young boy who is hospitalized at the same time as Ryotaro following a car accident. He opens a contract with the Crust Imagin such that he would be able to play on his soccer team, again, which leads to all of his teammates hospitalized because of attacks by the Crust Imagin. The Imagin then travels back to October 15, 2006, the day that Daiki missed a winning penalty shot for his soccer team. Despite the shot being interrupted by the Crust Imajin, Daiki still remains benched but had no ill will for it.
Yumi Saitō
Yumi Saitō is a young woman who is wooed by Ryotaro while possessed by Urataros. She inadvertently opens a contract with the Crow Imagin to forget about her ex-fiance Tomoya Ōbayashi, which leads to the Imagin eliminating anything that plays Four Seasons Concerto No. 1: Spring, the final item of which is Yumi's music-playing locket that she is using to remember Tomoya. The Imagin travels back to July 24, 2006, the day of Yumi and Tomoya's wedding. In the end, Yumi and Tomoya reconcile with the help of Ryotaro and Airi.
Shinji Kikuchi
Shinji Kikuchi is a karateka who wants to become the best karate master. He opens a contract with the Rhino Imagin, who fought all of his former opponents to fulfill his wish to be the best. But in truth, Kikuchi wishes to finally settle things with Honjo. The Imagin then travels back to May 21, 2006, the day of the karate tournament where Kikuchi won by default. He now trains with Honjo, so they can settle their match one day.
Masaru Honjō
Masaru Honjō is a karateka who has been hospitalized since his last match, forced to retire. He opens a contract with Kintaros to become a better karateka so he and Kikuchi can settle things. This contract involves Kintaros taking control of Honjō's body and leading him to several karate dojo's throughout the city and battling the individuals inside such as the Okamoto karate dojo. Kintaros then travels back to May 21, 2006, when Honjō had a heart attack so Kintaros would save him and Kikuchi from the Rhino Imagin. He now trains with Kikuchi so that one day their match would be settled.
Kensaku Kobayashi
Kensaku Kobayashi is the father of child model Kasumi Kobayashi. He opens a contract the Ivy Imagin to make it so he would have more time with daughter, which leads to it attacking her. It then travels back to November 8, 2006, the day that Kensaku kicked his daughter out of the house so she would be able to go further in her career. Due to Kintaros' attempt to change the past, the result negated Kensaku's contract and thus he and his daughter reconcile.
Shūji Toyama
Shūji Toyama is the groundskeeper of Yoyogi Park where he takes care of the stray animals. He opens a contract with the Owl Imagin and asks for the park to become a better place for the animals, which causes the Imagin to attack all those who try to enter the park, and blockade it off. It then travels back to February 20, 1997, the day that a puppy named Koro died and a young boy named Rēji who Toyama had befriended stopped returning to the park out of guilt. In the end, thanks to Ryutaros, the puppy survived its operation.
Kōsaku Higuchi
Kōsaku Higuchi is the president of a construction company who made a drunken contract with the Whale Imagin to get rid of his drinking problem. This leads the Imagin to attack all those that knew he had a drinking problem. It then travels back to March 31, 2004, the day that Higuchi drunkenly threw away his company's savings.
Yuka Sawada
Yuka Sawada is one of Ryotaro's high school friends who left to study abroad in England. She made a contract with the Wolf Imagin to relive her high school days, after which it went to April 7, 2004, the day of her and Ryotaro's high school entrance ceremony. Though she originally knew of Yuto, that knowledge from her memory is eventually erased.
Kōhei Amano
Kōhei Amano is a man who made a contract with the Jelly Imagin in hopes of digging up a time capsule, which is buried by his late girlfriend Haruka, and thus holds her final memento depicting Amano's boxing days. However, his wish backfires as the Jelly Imagin ends up forcing him to do the digging of a random time capsule, almost killing him in the process. In the end, he is given the box's contents by Ryotaro and Hana: His old boxing gloves and a photo.
Tanaka
Tanaka is young man who collapses out of exhaustion selling candies and other goods for the upcoming Tanabata Festival. While Deneb took his place, Tanaka forms a contract with the Tortoice Imagin in a dream-like state. Though it thought making Tanaka's boss suffer is the wish, the Tortoice is not able to travel back in time due to the fact that Tanaka did not remember the contract in the first place. Although it is Tanaka's wish to make his boss suffer, he later reveals that it is not his current boss in which he is relating to. In the end, Tanaka is given praise for his success in selling out the candy booth (which is handled by Deneb, Hana, and the others) despite both he and his boss being injured.
Akio Masuda
Akio Masuda is a young man who kidnaps the newborn baby of Shiori Takayama, because he bears a grudge on the Takayama family for firing him five years prior. But when he discovers the baby is missing, Masuda forges a contract with the Scorpion Imagin, telling it to bring him Shiori so that he can hold her for ransom instead. In the end, Masuda is arrested.
Shiori Takayama
Shiori Takayama is the daughter of a wealthy family who inadvertently made a contract with Sieg, the Swan Imagin, to make sure that her baby would be born safely. However, shortly after she gave birth to a son, Yusuke, he is kidnapped by Akio Masuda, and Sieg emerges and, with no clear memory, believes he had opened the contract with the baby instead of the mother. Sieg sees Shiori as his mother and Yūsuke as his brother.
Masashi Aoki
Masashi Aoki is a young man who has a sick younger sister named Mayu. He opens a contract with the Spider Imagin as his sister wishes to see a starry night. However, it turns out that Mayu really wishes to see shooting stars with her brother.
Shōichi Ike
Shōichi Ike is a bumbling jewel thief who resides in a chicken-ridden building. He is confronted by the Molech Imagin so he would open a contract with the Bloodsucker Imagin to serve as distraction as part of Gaoh's plan. However, when the Bloodsucker decides to the retrieve the jewels, Ike reveals that he secretly took the jewels behind Katō's back and sold them off after he went to jail.
Hiroshi Katō
Hiroshi Katō is Shōichi Ike's partner in crime. In the year 2000, he and Ike successfully stole 100,000 yen worth of jewels from the Nakano jewel store, and hid the stash in a building that would later become the Milk Dipper, before being arrested by the police. Seven years later, he attempts to regain the stash before being forced into a contract with the Molech Imagin, possessing him to attack Hope Jewelers and steal a necklace to complete the contract and go back in time as part of Gaoh's plan. In spite of Ryotaro's interference, the Molech Imagin succeeded in getting Katō's necklace thanks to M-Ryotaro's folly.
Machida
Machida opens a contract with the Wasp Imagin in order to have it hide the evidence of a manslaughter that he committed in 2005 in the location that became a haunted attraction visited by Ryotaro, Hana, and Deneb. In the end, Machida is found out and arrested, but is glad to see that his "victim" survived and set up the attraction so he can be brought to justice.
Tooru Terasaki
Tooru Terasaki got into a fight with his wife five years ago when he quit his job to go into the fireworks business. The incident results with the two becoming divorced, the ex-wife gaining custody of their son Ryu. But in spite of that, Tooru continues his intended career move so he can show his wife and son the fireworks display he is setting up for the end of summer celebration in present time. He ends up opening a contract with the Bluebird Imagin in order to find his wife and show her fireworks, going back to the day Tooru and his wife parted ways. In the end, Tooru is reunited with his wife and Ryu.
Yuya Fujishiro
Yuya Fujishiro is originally another of Airi's would-be suitors when the Milk Dipper first opened, only to withdraw when she fell in love with the older Yuto Sakurai, whom he despised ever since. From the next two years, Fujishiro became the successful owner of a mortgage company, using his funding to force Airi to marry him by setting her up with debt for 10 million. However, Airi refuses and Fujishiro out of frustration and refusal to let her leave, jogs her memory of Sakurai until Yuto arrives, though Fujishiro mistook him as the brother of his Sakurai. However, he unknowingly opens a contract with the Anthopper Imagin, who use him to get Den-O while granting his wish to have Airi. However, once Yuto uses his last Zeronos Card, the memory of the Yuto Sakurai that Fujishiro had is completely erased as a result.
Piano Man
The Piano Man is a mysterious figure who opens a contract with the Kraken Imagin for a piano. However, the contract is not entirely completed as the presence of Yuki Okumura is needed. It is revealed that the Piano Man was a master pianist who retired thirteen years prior and met Okumura, who was a fan of his work and learned from him to be a pro. But on the night he was to have his big break, Okumura was struck by a car and ended up in a coma. Though everything and everyone destroyed by the Imagin in Gigandeath form are restored, the Piano Man is nowhere to be found, being unable to return to his own time because no one from his time remembers him except Okumura. However, instead of being erased from existence as Ryotaro had feared, the Piano Man instead ends up as a passenger on the DenLiner until one day Okumura wakes up so the Piano Man can be able to return to his own time.
Yamaguchi
Yamaguchi is a man who unknowingly opens a contract with the Ax-Hand Mole Imagin. He sought to beat the head of the Okamoto karate dojo, who defeats him in a karaoke event on November 26, 2006. The Mole Imagin, however, interpreted his desire for revenge as a physical method.
Shōko Hazuki
Shōko Hazuki falls in love with Yuto after she is helped while he is possessed by Deneb when he is attempting to get Yuto back together with Airi. She is forced into a contract with the Oct Imagin on Kai's order prior to the event, with her desire to be with Yuto being her wish. While in the hospital, being cured of a hard disease, she learns from seeking a butterfly's cocoon that living today for tomorrow is the most important thing to do. But in the end, Shōko loses all memories of her time with Yuto, with Deneb feeling guilty for making her suffer in spite of his good intentions.
Ōzaki
Ōzaki is victimized by the Shirakaku mob into paying them for protection. When he makes a contract with the Armadillo Imagin, Ōzaki wants to cut his ties with the Shirakaku. However, the Imagin took the term "cut" literally and it takes the time portal opening to complete the contract.
Labels: Character, Den-O, Imajin, Kamen