Buzam A. Calessa

Buzam A. Calessa, more commonly known as "BC", is second-in-command of the Nirvana. She is austere and all-business, and looks after the general welfare of the crew. BC, a skilled tactician, gives orders firmly and decisively. She is always seen on the bridge to access data and review the crew's performance.

During the early episodes, BC is seen taking a small data disc from the bridge's database discreetly until she is interrupted by Magno. Her suspicious actions are overlooked and are deemed irrelevant until the Second Stage, where it is revealed that she is actually Tenmei Uragasumi, commander of the Taraak Intelligence and a male spy from Taraak who underwent a complete sex change and assumes a woman voice through the green, jewel-like device on her necklace.

However, because of the experiences she had with the Nirvana crew members and the bond she created with Magno, she remained loyal to the Nirvana crew members. In the end Magno forgives her and allows her to remain second-in-command of the Nirvana, under the condition that she remain BC.

Trivia

 * In the manga, BC is a woman (biologically). She is also a villain. She is referred to as Buzam rather than BC.
 * Towards the end of the Second Stage, Bart Garsus, pilot of the Nirvana, develops feelings for BC, unaware of her secret. When he finds out, he is unaffected. Rather, he still pursues for a relationship with BC.