Naguri

Naguri is a former Pirate captain that lived in the Grey Terminal 12 years ago from the current storyline. It is unknown where he is, or even if he is still alive right now.

Naguri is a character who appears during the childhoods of Luffy, Ace and Sabo and saves them from a large rampaging bear. He currently lives in Gray Terminal.

History
Gold Roger's crew and was easily defeated. After that his crew suffered a major hit and eventually disbanded.

Many years later he would settle in the Gray Terminal where he is known as an old man who according to Sabo invents "weird stuff" out of the junk he collects.

Later, on an expedition the trio performs, they fight with a large bear whom they are unable to defeat. However Naguri is capable of defeating it easily and forcing its retreat. The trio and Naguri then begin to eat the fish they wanted to use to lure the Giant Tiger, and is surprised to know Ace is Gold Roger's son.