Lieutenant Hizuki's assistant until she is transferred with the Sonic Diver unit to the naval destroyer, Koryu. She collects and monitors Sonic Diver data. She is a reliable girl who is quick at her work. She is also shy and mousy but is known for having the largest bosom in the show. She was born on an island and has a younger sister named Hakashi and a childhood friend named Kurosawa Hiroharu. A picture of her is featured every episode when advertising the sponsors.