Нептун

Occupations: Captain of the Royal Guard (former); King of the Ryugu Kingdom

King Neptune, known as "God of the Sea", is a coelacanth merman and the king of the Ryugu Kingdom on Fishman Island. He is the father of Fukaboshi, Ryuuboshi, Manboshi, and Shirahoshi, and the husband of the late Queen Otohime. Neptune seems to be very blunt, he also tends to shout his words out for no reason, including a habit of shouting his own name at random times, being followed by his whale shouting "Hoe". Neptune sometimes mispronounces people's names, as he refers to Zoro as "Zori". He appears to be easy-going, absent minded, and carefree as he was scolded by his ministers for leaving the castle on a whim on more than one occasion.

He has a tendency to finish most of his his sentences with the word "jamon". However, he can be serious when the situation demands it.

Neptune is well aware of the Void Century and poneglyphs, as well as the dangerous potential they pose to the world.