Hiroshi Tennoji

Hiroshi Tennoji (天王路 博史 Ten'nōji Hiroshi?) is the chairman of BOARD who intentionally set up the series of events in the fake Battle Fight and the creation of the Catergory Ace Keroberos, so that he could have his dream come true. This warped dream was of a new world order with himself as its ruler.

Undead Cerberos
An artificial Undead born from the card Tennoji made from the DNA of all 53 Undead, surpassing the Black Joker itself, Kerberos was created as the fifth Ace that Tennoji intended to be the victor of the Battle Fight he set up. Keroberos was beyond Tennoji's control, killing his entire staff upon being born from the Stone of Sealing. The Undead absorbed the decks of Chalice and Leangle, along with Jack and Queen cards of Garren. Kerberos even overpowered Blade King Form at first, but was defeated by Royal Straight Flush. But Tennoji sealed the Undead himself into the Change Kerberos card for his true plan: Using a surgically graft device based on the Rider System technology to fuse with his creation, becoming Kerberos II with Tennoji's face on the monster's chest. It took all 4 Riders to fight Tennoji/ Keroberos II, with Blade King Form's Royal Straight Flush and Wild Chalice's Wild Cyclone to stop the fusion. However, the Giraffa Undead takes the Change Keroberos for himself in the fight's aftermath for his own agenda. Though thought to have been lost in the fight with Giraffa, the Change Keroberos was used as the Ace card for Kamen Rider Glaive in Missing Ace, with 2 copies of the card used in creating Riders Lance and L'arc.