|This article is about a/an villain in Kamen Rider Decade.|
Yuki (ユウキ Yūki) is the Queen of the Fangires from the World of Kiva. Her true form is the Thorn Fangire (ソーンファンガイア Sōn Fangaia), whose true name is Perishing at the Altar, Silence from a Deep Kiss (滅びゆく祭壇に、沈黙より深いキスを Horobiyuku Saidan ni, Chinmoku yori Fukai Kisu o).
She is a sea cucumber Fangire that belongs to the Aqua Class (アクアクラス Akua Kurasu) Tribe and able to execute her own version of the "Final Zanvat Slash". Though she supports Wataru, Yuki actually sides with Apollo Geist, marrying him to give him immortality so she can have a place in Dai-Shocker. When Tsukasa crashes the wedding, the Thorn Fangire fights him and is killed by Decade Complete Form with Ryuki Survive's power.
- Height: 187 cm
- Weight: 98 kg
Behind the scenes
- Yuria Haga (芳賀 優里亜 Haga Yuria) portrays Yuki, having portrayed the similar character Mio Suzuki in Kamen Rider Kiva.