Kanai

Kanai (金居 Kanai?) is the human form of the Giraffa Undead (ギラフアンデッド Girafa Andeddo?), the last King (of Diamonds) Undead to appear.

Overview
Posing as a human with eye glasses, he is the first Undead to learn the truth about the fake Undead battle and the last Royal Club Undead to be sealed. He kills Tennōji, after using the Riders to fight for him, and steals the Kerberos card to possess the power to seal the Black Joker himself, black-mailing Hajime with the event of their fight tied to the death of Amane's father to finish the fight. However, Garren intervene and battled the Giraffa Undead on his own, with his Garren Rouzer having no effect. The Undead was eventually sealed as Garren grabbed him and both plunged off the cliff they battled on