Araumi Funato

is pirate who is the head of the Funato Clan.

Background
During his time leading the Funato clan, Araumi was known for his dangerous power over water, as well as his abductions around the Land of Water. In recent years, an operation to apprehend Araumi was successful and he would spend the next five years in prison, far from the open sea and isolated from any source of water.

Appearance
Following his incarceration, Araumi has long, unkempt blond hair, including a beard and moustache. He appears emaciated due to his imprisonment.

Abilities
Araumi likely carries vast Water Release capabilities, with Kagura Karatachi stating he cannot be allowed any access to water.

Great Sea Battle of Kirigakure Arc
When Kagura showed Boruto around the prison during his visit, he took him to the maximum security area, and explained who Araumi was. He cautioned Boruto against getting too close the the glass barrier between them and Araumi.

Trivia

 * Written as, his name means "rough seas".