Yasuo Nanbu

Officer in Yamato‘s tactical division. Chief gunner. His rank is Lieutenant Junior Grade (or Second-grade Space Lieutenant). A native of Tokyo.

Manages the performance of weapons such as the ship’s cannons and missiles to support tactical operations. He is a heir to Nanbu Heavy Industry, a major munitions company. When he was selected as a member of the Yamato Plan, he joined over the objection of his parents

(Source: ourstarblazers.com)