Gokai

is a pirate from the Funato Clan.

Background
Gokai was already part of the Funato clan when Araumi Funato returned from one of his raids with an orphan named Tenma, who he would take in as his son.

Personality
Gokai is a rational man who tries to cool off the short-tempered Funamushi, but due to his lower rank in the team, he has to obey his leader, who does not listen to Gokai's ideas.

Appearance
Gokai is a man of medium height with short dark hair. He wears the standard Funato pirate outfit, consisting of a grey vest and pants, and has a signature purple tattoo on his head.

Abilities
Like many soldiers in the Funato Clan, he has capable skill in Water Release, able to imprison people in it. He demonstrated great physical strength, easily carrying Funamushi, who is twice as large, on his shoulder. He also has leadership qualities and appears to be the second highest ranking member of the team, having taken command after Funamushi's defeat.

Great Sea Battle of Kirigakure Arc
Gokai had joined Funamushi's elite squad of Funato soldiers to attack Kirigakure while the rest of the clan would distract the Mizukage's forces at sea. As Gokai and the elite squad headed to a nearby village for supplies, a Funato scout informed Funamushi that the bridges ahead had been cut down.

Later, when the group of shinobi led by Kagura Karatachi was ambushed by the Funato, Gokai informed Funamushi of their confrontation with the enemy. After the shinobi retreated from their short clash, Gokai suggested to Funamushi not to pursue them due to them having a home advantage at the village. Funamushi choked him in response, unwilling to let an opportunity to avenge Seiren slip by.

Gokai and the elite squad confronted the shinobi again at the village, who overwhelmed them with their teamwork. When Funamushi absorbed the blood of two Funato soldiers to form another water tornado, Gokai and two other Funato soldiers trapped some of the shinobi in water prisons, leaving them vulnerable to Funamushi's jutsu. After Funamushi stabbed Kagura, the shinobi retaliated and Boruto Uzumaki hit Funamushi with his Rasengan. Gokai took command and had the Funato retreat. Funamushi refused, wanting to fulfil his revenge, but could not go on further due to his injuries and was carried off by Gokai as they fell back.

Trivia

 * Depending on the kanji, gokai can have different meanings, which seem to apply to the character:
 * Written as 誤解, it means "misunderstanding", relating to his rejected suggestion of not pursuing Kagura's group.
 * Written as 五戒, it refers to the "Five Precepts", a Buddhism term for basic ethics and morality, which as a pirate, Gokai wouldn't follow.
 * Written as 沙蚕 or 砂蚕, it refers to a type of worm, similar to his superior Funamushi's name.