Curly Dadan

Dadan (ダダン, Dadan) is Garp's friend whom Garp entrusted to take care of Ace after Ace was born. Later, Garp also left Luffy in Dadan's care. It's confirmed that Dadan is a male, he's also a good friend to Ace and Luffy.

Beyond the name, nothing is known about who Dadan is. In Yellow Databook his name appears alongside in Dragon's biography.

Dadan is the center of myths among fans.