Profile: A third-class citizen of the Tarak empire, Hibiki makes his living toiling away as a mechanic and inventory taker. However, he desires something more, and seeks to escape the low-respect life of a peon despite his co-workers' doubts. From the beginning this gets him into a bit of a bind when, he sneaks aboard the warship where the Vanguards, mechas he and the other third class citizens have been working on, are stored, in order to steal one. As soon as Hibiki locates the one he made a mark on one part of as he worked on it, and is about to take it when the ship launches. It's not long until he is discovered, and is imprisoned along with Cell unit 6. The ship is soon attacked, however, by none other than women! As most of the other men on the warship escape, Hibiki is taken as a prisoner. Because of his knowledge of the Vanguards, Hibiki ends up the sole Vanguard pilot on the Nirvana.

Despite Hibiki's outward appearance of acting tough and being rather crude to everyone he meets, Hibiki is in reality a pretty pathetic person, afraid of women and wanting to escape from his horrid life, but unable to do anything about it and constantly doubting himself. He almost gives up - but is spurred on by his unique situation and the fact that only he is able to pilot the modified Vanguard that survived the Nirvana's creation. To add to Hibiki's problems, he has to deal with fellow pilot Dita's constant hovering and curiousity, and at first, finds her geniunely annoying. However, in time, Hibiki begins to forge a kind of relationship not only with Dita, but with everyone on board the ship, something which changes him forever.