Curly Dadan

Garp: You take care of him Dadan

Dadan: What?! Whose child is this?!

Luffy: Dadan?

Garp: That's right, you'll be staying with these guys from now on I left you and Ace with a friend of mine.

- Garp I wonder if Dadan knows about this...

- Woop Slap wondering if Dadan knows about the incident in Enies Lobby. In one of the anime subs, it was mistakably changed to 'Dragon' instend

Dadan (ダダン, Dadan) is a friend of Garp's of which he left to take care of Ace. Later, Garp also left Luffy in the care of Dadan.

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

Dadan is the center of a myth among fans.