Stool (ストウール, Sutouuru) is an inhabitant of Cocoa Weed. He's the owner of a restaurant in which it has his name. He's the father of Tamachibi. At first, he didn't believe his son was sick until Kureha arrived.
First Appearance: Chapter 134; Episode 81

Source: http://onepiece.wikia.com/wiki/Stool