Sakuya Hishigata

Sakuya Hishigata is a Rank Ace senior employee of BOARD who has the ability to transform into Kamen Rider Garren with the sealed Stag Undead After Kazuma's demotion, he starts treating him badly until he himself got demoted after losing his Rider System to Chalice. His life energy is then used by Hajime to create the Joker card.Garren later appears in the World of the Rider War, though it is unclear whether Hishigata survived the incident in his World, or if a new Garren was chosen. This Garren eventually disintegrates together with Kazuma in the aftermath of Apollo Geist's merging of the Rider Worlds.