Weapons/Arms Dealer

He is a Weapons/Arms Dealer (武器商人, Bukishounin), and the person who supplied weapons/arms to the Fog Troupe. In the manga, this person and Markkio, or "Banker", turned out to be the same person, while in the anime, this person was revealed to be Isnan.

Magic
Bolg
 * This is said to be the proof of a Magician. It is a defensive ability. It blocks out attacks with evil intentions. It also blocks out all physical attacks and magical attacks to some degree. It's strength, however, depends on the person.

Black Rukh
As a member of Al Sarmen, this person is able to create and manipulate Black Rukh.

Trivia

 * In the anime, Weapon/Arms Dealer and Isnan, not Markkio, seem to be the same person.