Markkio (マルッキオ, Marukkio) or "Banker" (銀行屋, Ginkōya), which is the name he goes by, is the person who supplies Huang, the Kou Empire's paper money, to Ahbmad Saluja, King of Balbadd. Banker and the Weapons/Arms Dealer who provided weapons/arms to the Fog Troupe are the same person.