|This article is about a/an Fangire in Kamen Rider Kiva.|
The Horse Fangire (ホースファンガイア Hōsu Fangaia) was the first monster to appear in Kamen Rider Kiva. His true name was "The Sincerity and Melancholy that the Twin Impostors Dream About" (双子のペテン師が夢見る、誠実と憂鬱 Futago no Petenshi ga Yume Miru, Seijitsu to Yūutsu) and he was from the Beast Class (ビーストクラス Bīsuto Kurasu).
Wielding a sword as his weapon and able to breathe mist, the Horse Fangire poses as a successful company manager in 1986, feeding on his secretaries until Yuri Aso attempts to kill him. However, Otoya Kurenai's interference allows him to escape.
By 2008, Horse Fangire assumes the identity of robbers during the events of Climax Deka, accompanying the Pink Rabbit Imagin as they fight Den-O and the Taros. He is destroyed by Den-O Sword Form. But, his soul escaped. After restore his body, he assumes the identity of a teen model agent, targeting Megumi Aso. Due to Megumi's trickery, the Horse Fangire ends up being destroyed by Kiva and sealed in Castle Doran.
- Height: 220 cm
- Weight: 280 kg
- Later the upper body of the suit were repainting and use as the Zebra Fangire's upper body. The lower body of the suit were repainted and used as the Sheep Fangire's lower body.
- Both of the Horse Fangire's assumed identities are names associated with Kamen Rider Agito:
|Wataru Kurenai - Kivat-bat the 3rd - Demon Imperial Dragon Tatsulot - Castle Doran - Shoodoran|
|The Arms Monsters: Jiro - Ramon - Riki|
|Gear: Kivat Belt - Fuestles - Demon Imperial Sword Zanvat Sword - Machine Kivaa|
|2008: Mamoru Shima - Keisuke Nago - Kengo Eritate - Megumi Aso|
|1986: Otoya Kurenai - Yuri Aso|
|The Checkmate Four:|
|1986: Queen I - King I|
|2008: Bishop - Rook - King II - Queen II|
|Pawns: Horse Fangire - Octopus Fangire - Moth Fangire - Sheep Fangire - Ryo Itoya - Prawn Fangire - Frog Fangire - Earwig Fangire - Rhinoceros Fangire - Seastar Fangire - Ladybug Fangire - Chameleon Fangire - Grizzly Fangire - Shark Fangire - Crab Fangire - Cicada Fangire - Warthog Fangire - Moose Fangire - Horsefly Fangire - Rat Fangire - Mantis Fangire - Seamoon Fangire - Silkmoth Fangire - Polar Bear Fangire|
|Takato Shiramine - Takashi Sugimura|
|Mummy Legendorga - Medusa Legendorga - Mandrake Legendorga - Gargoyle Legendorga - Antlion Legendorga|
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