Kobuna

is Funamushi's son and a young pirate of the Funato clan.

Personality
Kobuna is a rather self-confident boy who loves family deeply. Originally, while committed to the Funato and hoping to defeat Kirigakure, he was a cheerful boy, always eager to help out his clansmen. Upon learning of his father's death, however, he immediately committed himself completely to decided to avenge his father.

Appearance
Kobuna is a young boy with yellow eyes and dull eyebrows. He has short brown hair, in the centre of which there is a small mop of thicker straw-coloured hair. He wears a red tank top, shorts and sandals. Kobuna also has a signature purple Funato Clan tattoo on his face shaped like his father's and also wears a small pouch around his neck.

Abilities
Despite his young age and lack of real experience, Kobuna fights at close range with knife, being able to keep up with Boruto Uzumaki for a time. For long range combat, he uses a blowpipe to fire senbon, showing considerable aim to hit all his targets on the shooting range. He is apparently a strong swimmer, claiming to hold his breath underwater for over 3 minuntes. Due to his inexperience, he readily relies on Gokai's assistance and command.

Great Sea Battle of Kirigakure Arc
Kobuna and Gokai attacked Boruto, wishing to avenge Funamushi's death. Boruto defeated Gokai with ease, but upon learning that Kobuna is Funamushi's son and hearing how his words were similar to his and Buntan's when talking about avenging Kagura, he froze. Sarada arrived in time to protect him from another attack, causing Kobuna and Gokai to retreat.