While playing Grand Theft Auto Online, some players may occasionally encounter an aggressive man driving in a black Sentinel XS. He can be encountered when the player returns to Free Mode after finishing a Job, driving past the player on the road, or when Simeon requests a vehicle.
Unlike normal pedestrians, the driver has special characteristics that make him stand out. One characteristic is that the driver will never try to escape if there is a fight. Another characteristic is that the driver will not hesitate to run over the player, and can engage in a gunfight by sometimes pulling out a Pistol. Another characteristic is that he drives recklessly on roads, weaving in and out of traffic and ramming cars blocking his path. The driver will also have the stereo turned up to high volumes at all times as well. These actions make the driver noticeable during gameplay.
While the Sentinel XS is the most common car for the NPC to drive, he will sometimes drive other cars as well, such as the Patriot, Dominator, Tailgater, Oracle, Cognoscenti Cabrio, Monroe and many other cars. However, whatever car he drives, it will always be either a black Sentinel XS, Tailgater, Patriot, Dominator, Feltzer, Stinger GT, Entity XF or a silver Cognoscenti Cabrio, Monroe, Stinger, Vacca, Infernus, Adder or a Surge, Fusilade, Habanero, Serrano, Gresley, BeeJay XL, F620, FQ2, Schafter, Jackal, Landstalker, Prairie, Buccaneer and the Penumbra in various colours and many other cars.
This special, scripted NPC is coded so he will spawn driving a car that is often requested by Simeon Yetarian. He always spawns when the player joins a new session.
Similarly to the Cavalcade driven by Lester's Target, the Sentinel driver will be able to be locked onto with the rocket targeting of a Buzzard Attack Chopper or missile targeting of a P-996 LAZER, which is another indication that the character is not a "normal' civilian NPC.