Sieg

is a Imagin and unofficial member of the Taros who transforms into 's Wing Form.
==History==
===Kamen Rider Den-O===
Sieg arrived 6 months prior to Ryotaro becoming Den-O, originally intending to forge a contract with a young wealthy woman named Shiori Takayama. But she was pregnant and Sieg ended up inside the baby in a deep sleep until he emerges in physical form with no memory of the wish and believes that he forged a contract with the baby, Yusuke, instead of Shiori as he had planned. Sieg took his "brother" out of the strange area he found them in, only to meet Ryutaros who takes Sieg to the DenLiner, where the Imagin got his own sleeping car with a lavish bed and Ryutaros helped fill it with stray puppies and kittens. After a series of events that clear Ryotaro of Yusuke's abduction, Sieg uses the human's body to reap the benefits of living with the Takayama family
However, because Yusuke's mind is too young to maintain his existence, Sieg begins to fade away, but not before becoming Den-O Wing Form to fight the Scorpion Imagin. After the Scorpion Imagin is defeated, Ryotaro returns with a Rider Ticket that he got from Shiori that bore the date June 1, 1997, revealing that Sieg did have a contract with her. He then remembers Shiori's wish for her baby to be born safely, fulfilling that contract. Afterwards, Sieg arrives in the past through boarding the DenLiner to complete the contract, maintaining his existence to live peacefully. 
====Kamen Rider Den-O: I'm Born!====
However, during the hijack of the DenLiner, Sieg offers his aid to Ryotaro in the Tarōs' stead as only he could possess Ryotaro's body, deciding to repay his debt to Ryotaro for preventing his disappearance. 
He battled the Cobra Imagin in the Edo period while befriending Kotaro. He would aid the DenLiner gang two more times, aiding in Ryotaro getting stronger and later assisting Ryotaro and the others in defeating Kai's army of Imagin after being retrieved by Naomi. But due to his birth and time with Ryotaro creating a time lag, Sieg is able to maintain his existence as he takes his leave in the DenLiner.
====The Climax Goes On, No Matter What====
In final episode, Naomi returns Sieg to the present for the latter for the final battle, where he protected Kohana, and helped Taros and Deneb defeat the Death Imagin.
==Post Series and other events==
===Saraba Kamen Rider Den-O: Final Countdown===
During the events of "Final Countdown", Sieg greets the DenLiner crew in May 23, 1729 as their contract, offering his help as Wing Form during the battle against the revived Imagin. Following a pattern of showing up when help is needed, he appears later to help in the battle of the returning Oni forces.
===Kamen Rider Decade===
====Here Comes Super Momotaros!====
Sieg appears in Kamen Rider Decade when Tsukasa and company were about to enter the World of Kabuto when they get an unexpected visit from the Imagin Sieg. With a manuscript on Sieg's person, it appears that the adventures in the World of Den-O are far from over.
====Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship====
Taking place after the events of Kamen Rider Decade episode 15, under the impression that they saved the World of Den-O, Tsukasa Kadoya and company begin their journey to the World of Kabuto when they are halted by Sieg who presents them a manuscript that detailed the legendary Oni Conquest with Momotaros' image on it. As this occurred, the Tarōs mysteriously vanish from the DenLiner as they are about to help Kotaro Nogami out with the true threat to their world.
Traveling to that time, the kids find Tsukasa who offers his aid. Kotaro is reluctant to accept his help until Tsukasa reveals the scroll Sieg brought with him that has Momotaros on it.
Later Kuchihiko reassembles the Oni's Trump Stone with Mimihiko activating the Demon's Warship in the present and using it to return to the past. The Oni Brothers are able to defeat them until Tsukasa and Sieg arrive, allowing Den-O to assume Wing form as Momotaros possess Tsukasa.
At Decade's suggestion, Ryotaro forms Kamen Rider Den-O Super Climax Form with the Tarōs and Sieg. Cho-Den-O and Decade manage to overwhelm the Oni Brothers with New Den-O Vega Form and Teddy's aid. After Shilubara sacrifices himself to protect his brother, an enraged Goludora enters the Warship and engages the DenLiner in a battle with Decade taking his leave as the DenLiner gang manages to sink the Warship from the inside out as Kamen Rider Den-O Sword finishes Goludora off with a Rider Kick.
===Kamen Rider × Kamen Rider W & Decade Movie War 2010===
Kamen Rider Den-O Super Climax Form appears when the Nine Worlds' Kamen Riders arrive to support them, but the fight is still to Doras's advantage until Decade assumes Complete Form while having most of the Nine Riders assume their ultimate forms (Kuuga Rising Ultimate, Agito Shining Form, Ryuki Survive, Faiz Blaster Form, Blade King Form, Armed Hibiki, Kabuto Hyper Form, Den-O Super Climax Form, and Kiva Emperor Form), and together destroy Doras with an all-out attack. However, wanting to play more, the Neonoid sends out a mammoth robot to attack the Riders
===Episode Blue: The Dispatched Imagin is Newtral===
Sieg appears in the moment, when Momotaros and Ryotaro unable to continue, the Owner reassures the DenLiner crew that they still have hope as Sieg arrives, later With the others shocked, the Owner reveals Kotaro's friendship with Teddy saved him and restored their contract. Though the others were confused by the whole point of the Owner's actions, along with Sieg’s appearance, Kotaro believes it was to teach him a valuable lesson as he and Teddy are returned to their time.
==Video Game appearances==
===Kamen Rider: Battride War II===
Kamen Rider Den-O Wing Form reappeared in Kamen Rider: Battride War II.
kamen_rider-6.jpg
kamen_rider-7.jpg
kamen_rider-5.jpg
===Kamen Rider Battle: Ganbaride===
Kamen Rider Den-O Wing Form and Super Climax Form appear as playable characters in this video game.
G8944205.jpg|Kamen Rider Den-O Wing Form card
51b36zhaClL.jpg|Kamen Rider Den-O Super Climax Form card
===Kamen Rider Battle: Ganbarizing===
Although Kamen Rider Den-O Wing Form has not yet had his debut in this video game, Sieg still appeared in Super Climax Form and has his lines.
===Super Hero Generations===
Sieg as Kamen Rider Den-O Wing Form is a playable character with others Kamen Riders of Neo-Heisei era in the Video game.
===Kamen Rider Buttobasoul===
Sieg as Kamen Rider Den-O Wing Form is a playable character in Kamen Rider Buttobasoul.
==Other Game appearances==
===Battle Spirits ===
Sieg as Kamen Rider Den-O Wing form appears with other Kamen Riders and Monsters in Battle Spirits.
CB04-062.png|Sieg Battle Spirits card
CB04-040.png|Kamen Rider Den-O Wing Form Battle Spirits card
==Personality==
While in a contract with Shiori, Sieg gained a physical form based on the ballet , with "Swan" written on his breast plate, named after its character . Because of his princely mannerisms, Sieg becomes easily infuriated when treated with disrespect. During his first time on the DenLiner, he demanded that the others call him until he got hit by Hana, calling her since as he called the Taros his "friends". After his return, Sieg refers to the Tarōs as either his "family" instead of his "friend" phrasing, or his "retainers".
==Abilities==
*Size Reduction: Because he originated in 2007, Sieg possesses the unique ability of shrinking other Imagin to four inches in height for a bit of time with the phrase . In the Imagin Anime OVA, Sieg had an additional power that allows him to shrink everything in sight, even an entire planet.
*Possession:Whenever Sieg posses someone, the person gains white gold colored irises, white pupils, and white hair streaks. Said person will also obtain a white feathery scarf.
==Possessions==
Den-O-Ryotaro-Sieg.jpg|S-Ryotaro
S-Tsukasa.png|S-Tsukasa
==Forms==
==Equipment==
=== Devices===
*Den-O Belt - Transformation belt
*Rider Pass - Train pass used to invoke his transformation
*K-Taros - A cellphone used to invoke the Climax Forms
===Weapons===
*DenGasher - Den-O's primary weapon, due to how it appeared when used by respective Imagin, Wing Form's took the form of and .
==Legend Rider Devices==
==Behind the Scenes==
===Portrayal===
Sieg is voiced by who will later voice as Listol in HUGtto! Pretty Cure. In both his Imagin form and as Kamen Rider Den-O (Wing Form), his suit actor is .
While possessing others, he is portrayed by their respective actors while retaining his voice.
*As S-Ryotaro, he is portrayed by .
*As S-Tsukasa in Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship, he is portrayed by .
===Etymology===
His name may be a modification of .
===Concept Art===
Sieg was designed by . In the concept art, Sieg is called Swan Imagin.
==Notes==
*Sieg is based on Prince Siegfried from the Swan Lake ballet and fairy tale.
*Unlike all of Den-O's other forms, Wing Form is simply a retooling of the standard Sword Form rather than a different configuration of the standard armor or an entirely new costume.
*Sieg's name is given as "Zieg" in the series' photobook DETAIL OF HEROES: Masked Rider Den-O Exclusive Photograph Collection: IMAGINE, however, other materials give his name as "Sieg," such as the earlier photobook Masked Rider Den-O Photobook: IMAGIN
*He is the only single-possession form of Den-O to require an additional piece of equipment to the Den-O belt, necessitating the Wing Buckle.
*Sieg's role as Wing Form has mostly been limited to the Den-O movies. He only used it in the TV show once, and for little less than one minute, due to him fading away.
*Sieg and Ryutaros are the only Imagin that never possessed Ryotaro Nogami after he was de-aged.
*Sieg's fighting style as Den-O (slightly) resembles the traditional Chinese martial art, Tai chi, focused on calm, swift singular strikes rather than aggressive attacks and continuous movement.
*In the ART WORKS Monsters toyline by Megahouse, Sieg is depicted having wings of his own in Imagin form. An S.I.C. figure also showcases that Den-O's Wing form is capable of flight, though neither ideas have made into the series proper.
**An indication of what could have been was seen during Den-O Wing Form's transformation in Kamen Rider Den-O: I'm Born!, where Den-O briefly manifested a pair of wings after the armor pieces were attached onto the suit.
Sieg Art Works Monsters.jpg
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==Appearances==
==See also==
==Navigation==
Category:Rider Powers
Category:Non-human Riders
Category:Den-O Riders
Category:Imagin
Category:Swan Monsters
Category:Den-O Arsenal
Category:Allies
Category:Kamen Rider Den-O
Category:Heroes
Category:Heisei Era Riders
Category:Den-O Characters