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.
It is shown that Markkio is still alive, but he has no memories of what happened in Balbadd.
Banker has shown some ability to manipulate Black Rukh.
- 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.
- The crown of thorns on his keffiyeh (white cloth on his head) is a symbol of debt in Islamic mythology, which relates to his purpose when disguised as Banker.
- In the manga, Markkio was defeated by Sinbad. But In the anime, he was got rid of by Ithnan.