Awaji Unabara

was the son of the Land of Water daimyō.

Great Sea Battle of Kirigakure Arc
After his father's speech unveiling the explaining the Shinonome 1 power station, Awaji embarked on the first airship that would take the audience to visit the station. However, it crashed and exploded soon after taking off, killing Awaji along with the passengers. After the war it sparked was over, Awaji's father pressured for the Funato ringleaders to be harshly punished.

Trivia

 * His last name means "ocean", his first name can refer to an island, province, or city in Japan.