Tashiro Tatsumi is the main commander of Exelion, headquarters of the anti-alien space fleet and guardian of the Gunbuster. In the last episode, captain Tatsumi will be in charge of every operations on the Eltreum; basically Tashiro takes every decisions concerning what to do and any military strategy, but the great decision the humans' future depends on will be taken by another person...

In the very near future, a race of huge, insect like aliens is discovered traveling the galaxy. These aliens seem dedicated to the eradication of the human species as it takes its first steps away from the solar system, and they are getting closer and closer to Earth. Humanity has responded by developing spacegoing battleships and giant fighting robots. These robots are piloted by the best and brightest of Earth's youth, picked from training schools around the world. 
The story begins in the year 2023, not long after the first battles with the aliens, and centers on young Noriko Takaya. Although Noriko's father was a famous Captain in the space fleet who was killed during one of the first battles of the war, her own talents as a pilot are questionable. Nonetheless, she has entered a training school. Through the series Noriko, joined by the beautiful and talented Kazumi Amano, will fight to overcome the trauma of war, the doubts of her peers, and her own lack of confidence. 
(Source: AniDB)

Tamio Ooki was a Japanese voice actor. He was affiliated with Mausu Promotion.

Comic Gunbuster is a compilation of short stories involving the main characters from "Aim for the Top" which take place during the time of the first OVA. Some of the stories include Kazumi Amano's marriage to Coach Ota and Noriko and Jung playing golf on the Moon. 
(Source: Anime News Network)