Akira Zaizen

Age: 26
Relatives: Aoi Zaizen (younger step-sister)
Occupation:
SOL Technologies Security Manager
Bounty Hunter (formerly)
Previous occupation:
SOL Technologies Chief
Hacker
Deck: Tindangle
He is the older step-brother of Yusaku's classmate Aoi Zaizen. He is also the former security manager of SOL Technologies, but was reinstated to his original position after the defeat of the Knights of Hanoi.

(Source: Wiki)