The following is based on Van Buren and has not been confirmed by canon sources.
Half-brother to Frieda Van Graff, Cutting was hauled off to prison a few years before the Prisoner's escape. Separated from his brothers and sisters he was unable to regroup with them by 2253. That is, if he is free, as it is not revealed.
Around 2281, Cutting has taken on the role of an enforcer, becoming the backbone of the Van Graff family security forces. He works in the Silver Rush alongside his half-sister, Gloria, and does his part in the politics of their operations in the only way he knows how; with the barrel of his laser rifle. He has Cutting as a surname, as opposed to Van Graff because it reminded his mother of her dead husband, who was also the enforcer's biological father.
Birds of a Feather, Heartache by the Number: Jean-Baptiste wants to have a little chat with a woman called "Cassidy." The Courier will need to find her, and bring her back to the Silver Rush. This quest requires committing to either the Van Graffs or Cass as it is not possible to satisfy both parties. Jean Baptiste's death means immediate fail of Birds of a Feather quest.
Jean-Baptiste Cutting has high health, more than most companions, as well as an incredible, and normally impossible, 117 Energy Weapons skill.
He is also notably taller than the Courier, much like Sammy Wins and Cursor Lucullus, although Cursor Lucullus is slightly shorter than these two.
While armed with a laser rifle, he will usually pick up the plasma caster in the middle of the store if engaged in combat, unless it was previously stolen by the Courier.
During Birds of a Feather, when he confronts Cass and shoots her, he might shoot the floor or ceiling and Cass will still die. This is because he is one of the only NPCs in the game that is fixed to kill another NPC by his own actions (i.e. through a quest).
PCPlaystation 3Xbox 360 If Jean-Baptiste is killed, his body sometimes cannot be looted. On PC, his inventory can be accessed through console by selecting the body with the mouse and entering activate player. This will bypass the activation script on the character and force the default interaction. [verified]
PCPlaystation 3Xbox 360 Jean-Baptiste has been known to disappear from the game. [verified]