Biz is one half of the small group known as the Sirga Twins of Shogun, being the twin brother of Giz. Because he is three seconds younger than his twin, Giz always tries to establish dominance over him which Biz doesn't allow easily and the two often fight because of this. His motivation for becoming a pirate is to gain enough notoriety around the galaxy to mate with Sirga females on Predin to help repopulate.
Biz is bipolar and has mood swings frequently, though ranging only from ecstatic to calmingly collected. Biz is far more mature than his irate and upsettable older brother. Though his primary goals are all in order, he is a chronic procrastinator. When faced with a dangerous task, Biz will strategize as opposed to Giz who will blindly charge into overwhelming danger. His strategic ways may come from his fear of danger, something he does his best to conceal.