|This article is about a/an Fangire in Kamen Rider Kiva.|
- "From now on...we will always...be together.... "
- ―Shinji's last words upon his reunion with Ryoko[src]
The Grizzly Fangire (グリズリーファンガイア Gurizurī Fangaia), who assumed the alias of Shinji Takeuchi, was one of the few Fangire who broke their race's laws by falling in love with a human. He lived with his wife Ryōko (涼子), whom he married in 1985. His true name was The Funeral and the Carpenter's Secret Pact (葬儀屋と大工が交わした密約 Sōgiya to Daiku ga Kawashita Mitsuyaku) and he was from the Beast Class. In his Fangire form, he had superhuman strength and sharp claws. In 1986, after saving his marriage and planting a silk tree with his wife, Shinji is confronted by Queen, who was on a mission to exterminate Fangires who were in relationships with humans. However, he was unintentionally saved by Otoya Kurenai.
By 2008, Ryōko is in a hospital, on the verge of dying from a fatal disease. As an expression of his love, Shinji steals various jewelry to give to her as presents. With the help of Wataru Kurenai, Shinji manages to grant Ryōko her final request to see the tree that they planted, learning that she knows he was never human and still loves him anyway.
However, after Ryōko passes on, Shinji goes berserk and faced off against Keisuke Nago as Ixa, who arrived to kill him. In his fury, he attempts to kill Mio Suzuki after she manifests the mark on her hand as the new Queen, assuming that her help was a lie and that she was out to kill him like the previous Queen. A failed attempt on Mio's life leads Wataru to unlock the true power hidden within Kiva and uses Emperor Form's Emperor Moon Break to mortally wound the Grizzly Fangire. In his dying breath, Shinji crawls to Ryōko's body to see and be reunited with her one last time.
- Height: 245 cm
- Weight: 390 kg