Vadin was once a member of the military organization known as the Tanduran and Dac United Commandos. He was an avid member of the Fourth Ranger Division, and had numerous achievements battling against numerous foes. However after New Tython fell, he left to become a Bounty Hunter, disillusioned with his life. He has come back for many reasons, mainly to help out the Clan who he worked alongside for so long.

While Vadin Cal will see a job through to its conclusion and put forward his best effort, it’s still just a job. Vadin Cal's true loyalties lie to his friends, and through thick and thin, he will stand by them and die for them if needed. This loyalty is reserved for those who have earned Vadin Cal's trust, putting him at odds with other Mercenaries that are only doing a job for the money. This also makes it harder for employers to trust his motives, often times creating extra competition and difficulty finding work. None of it matters to Vadin Cal, though, because loyalty to his friends is not something credits can buy.

Once a father, Vadin knows what it is like to loose a child. Having lost his daughter during the Fall of New Tython because he thought she was safe, Vadin has become more empathetic to the needs of others. His regret has allowed him to become more empathetic to the needs of others, something he feels Tanda would have wanted. He has on occasion angered his superiors as he takes time away from training to help others in need. Despite this, he does understand his role as a soldier, and even though he regrets what happened to his daughter, he knows she would be proud of him for continuing his job.

Vadin is humble, even for a Gand. He holds little value for himself, beyond a value for life, and will actively attempt to push aside compliments and his own achievements, no matter how spectacular. He actively despises the word I, and tries to avoid saying it at all costs. Despite his near disregard for his own life, he holds his comrades in the highest of regards despite any flaws they may have. This often gets him glares from people trying to stay in the dark, or those who think he should have more value in himself.

Vadin has spent several years studying his favorite animal, the Rancor. Having watched them fight, he has learned to meld their own wild fighting into his own technique. Much like a Rancor, Vadin has randomly accented his fighting style with wide sweeping strikes and brutal punches to disorient and damage his foes. While using these attacks he tends to leave himself open, however because they are only a part of his fighting style they are not common attacks for him to use.

Vadin was trained in the Tanduran and Dac United Commando's Fourth Scout Regiment. As a result he specializes in close quarters combat. Having trained extensively with his weapons, he has learned to use both the knuckle plate vibroblade, and the miniature flame projector with deadly efficiency. In combat he will often send short bursts of fire at incoming enemies, especially when focused on fighting a single foe. He has also used this tactic to drive people back while in one on one fights, to give him time to plan his next move. however in the time it takes him to switch between the two, he can leave himself open for counter attacks.