Ishigo is a pale man with short black hair and a black mustache. He wears a white shirt with purple overalls.
He is somewhat sneaky, as he tried to take the Straw Hats' gold for less money than it was worth.
When Luffy, Nami, and Usopp brought him their gold to exchange for cash, he appraised it to be worth 100,000,000. Nami then gets angry and tells him to stop lying, saying the gold is really worth 300,000,000. Ishigo realizes that he has been caught and becomes frightened of Nami. He then gives them the full cash value of their gold.