Sentinel is a custom minifigure from Rock Raiders 2.
The Irishman Sentinel is a born fighter and tactician. Equipped with a heat-sensing visor, photocell armour that recharges at the slightest flash of light, and his trusty NoxLight Corp. disintegrator beam, Sentinel is a mighty force even on his own—and his sharp mind, microbot spies with encrypted radio chatter and camera views directed to his helmet's interface, and intense study of warfare has boosted him in Captain Sparks Jr's approval and to the position of Team Strategist. Sentinel is excellent at what he does, and he knows it. Of course, it doesn't help that he is excessively vain, boasts about his skills, and makes every effort to impress.