Sieg is an Imagin who enables Den-O's transformation into Wing Form. He arrives in the current timeline six months prior to Ryotaro becoming Den-O, originally intending to forge a contract with a young wealthy pregnant woman named Shiori Takayama, but possesses her unborn son in the process. After the child is born and subsequently kidnapped, Sieg comes into being and seeks to reunite his "brother" with their "mother", crossing paths with Ryutaros and gaining access to the DenLiner. Due to his "privileged" upbringing and his already princely mannerisms, Sieg becomes easily infuriated when treated with disrespect. Because he is "born" in 2007, he also possesses extraordinary unique abilities. Aside from shrinking the TarÅ�s to 4 inches tall with the phrase "Kneel down to me!" (é ã�Œé«˜ã�„! Zu ga takai!),he also cannot be forcibly removed from Ryotaro's body as he does not need a contract to possess humans. When possessing Ryotaro, Sieg says "Descending, yet above it all…" (é™�臨ã€�満をæŒ�ã�—ã�¦… KÅ�rin, man o jishite…). He almost vanishes due to his contract holder being a newborn child and unable to form proper memories, but Ryotaro is able to discover that Sieg actually made a contract with the mother to ensure her then unborn son's safety, saving Sieg's life in the process. As his contract has been fulfilled, the DenLiner takes Sieg to the date of his Shiori's greatest memory and lives in the past freely. After his appearances in the television series, he appears in the films Kamen Rider Den-O: I'm Born! and Saraba Kamen Rider Den-O: Final Countdown allowing for the transformation into Wing Form, and again in Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship, pestering Tsukasa's group until brought to the climatic battle to join the TarÅ�s in forming Super Climax Form. He also appeared in Cho-Den-O Trilogy Episode Blue: The Dispatched Imagin is Newtral. During his first time on the DenLiner, he demanded that the others call him "Prince" (プリンス Purinsu?) and asked for Hana to be his "Princess" (å§« Hime?), and was punched for each time he called her that. After his return, Sieg refers to the TarÅ�s as his "family" instead of his "friend" phrasing. In the Imagin Anime OVA, Sieg had an additional power "Super-Ultra Kneel down to me!" (スーパーウルトラé ã�Œé«˜ã�„! SÅ«pÄ�-Urutora Zu ga takai!?) that allows him to shrink everything in sight, even an entire planet. His name is given as "Zieg" in the series' photobook DETAIL OF HEROES: Masked Rider Den-O Exclusive Photograph Collection: IMAGINE (DETAIL OF HEROES ä»®é�¢ãƒ©ã‚¤ãƒ€ãƒ¼é›»çŽ‹ç‰¹å†™å†™çœŸé›† IMAGINE DETAIL OF HEROES Kamen RaidÄ� Den'Å� Tokusha ShashinshÅ«: Imajin?), however, other materials give his name as "Sieg," such as the earlier photobook Masked Rider Den-O Photobook: IMAGIN (ä»®é�¢ãƒ©ã‚¤ãƒ€ãƒ¼é›»çŽ‹ãƒ•ã‚©ãƒˆãƒ–ãƒƒã‚¯ IMAGIN Kamen RaidÄ� Den'Å� Fotobukku Imajin?). Sieg's physical form and name are based on swan and Prince Siegfried (ジークフリート王å� JÄ«kufurÄ«to ÅŒji?) from the story Swan Lake (白鳥ã�®æ¹– HakuchÅ� no Mizuumi?).
Kazuhara's little sister that believes in the mystical arts. She uses spells and summoning to get things that she wants, with the assistance of her two body guards Hayate and Kosame. She listens to a fortune and discovers that she has a destined future with Yukinari. She tries ever so hard to steal Yukinari's heart.
The younger of the twin Harada sisters, Risa is initially the object of Daisuke's affection; however, she doesn't show the same feelings towards Daisuke as he does for her considering the fact that she feels that he is too normal and only thinks of him as a best friend since he's very kind and nice to her and she can rely on him for anything (to which she uses throughout most of the series). She is a rather naive young girl. Risa starts to develop a crush, then an obsession, with Dark upon seeing his attempt to steal an artwork broadcast over the news claiming that he is the mysterious person whom she is destined to be with. There is an ongoing sisterly rivalry between her and Riku. Compared to her sister she seems more innocent and clumsier and can be seen as your typical "girly-girl" though shows the same stubbornness, tenacity, and kindness as Riku. She would much rather prefer fashion and relationships than to physical activities. In terms of physical features her hair is much longer and she has a "softer voice," apart from that the two can't be distinguished (shown in episode 5 of the anime when the two switch places so Risa can get out of chopping cabbage as a form of after school punishment). Risa obsessively pursues Dark, coming up with intricate schemes and plans to make him go out with her, some of which eventually work. There's no doubt that she is quite clever and very persistent. Later on, however, Dark tells her that the two of them cannot see each other anymore. Near the end of the anime, subtle signs of a relationship between Risa and Satoshi start to show. (example: he places her on a park bench and covers her body with his jacket after she fell unconscious during their struggles with Krad. She then wakes up only to find the jacket and a single white feather which fell from it. Although not knowing who the jacket and feather belongs to, she can be seen treasuring it). In the manga this is more apparent, shown through small occurrences (example: he saves her when she fell off a building, when Daisuke saves her from drowning he shows concern and touches a lock of her hair). As the series progresses, Risa breaks out of being a naive little girl and develops into a more mature young lady.
Risa Mizuno is a girl Takaki met in Tokyo. They met a couple of times due to their work and started going out after a while. In the movie, Risa and Takaki were together for awhile and Risa started sending text messages to him, inviting him to hang out, but Takaki did not reply back since he still has feelings for Akari. When Akari moved on and got married, Takaki tried to move on and started dating Risa Mizuno, but eventually broke up. Risa's background story is explored in more depth in the manga and light novel. Apparently she and Takaki were dating for more than four years. They went on several trips and dates together; but besides from her attempts to move forward with their relationship, they stayed the same. This becomes explicit when she invites Takaki to meet her parents and he turns her down. He would use an excuses, but she thinks he was avoiding her because she tried to rush their relationship. Later on, Takaki admits that he had commitment issues due to his past since he really believed someday he would be together Akari again, so he couldn't truly love anybody else. Afterwards, Risa decides to break up with him and move on with her life. In chapter 9, after breaking up with him, she says, "I hope we meet again, in some new way, as new people, and that something new starts." (Source: xbobx, AkatsukiUlquiora)
Seiyuu: Episode 1 - 2 Jyunko Kusayanagi (è�‰æŸ³ é †å�) Episode 3 Rino Kawajima (ã�‹ã‚�ã�—ã�¾ リã�®)
She is Yuuki's classmate who is very popular in campus, however she is the only one who knows that Yuuki Kagami is staying with Kakinozaka Ayana the school teacher who is in charge of the student's dorm assignments.