Characteristics
Sentinels are designed to hunt mutants who often represent the protagonists of Marvel stories; therefore, the sentinels are usually employed as supervillains or as the tools of other villains. While many are capable of tactical thought, only a handful are self-aware.
Sentinels are technologically advanced, and have exhibited a wide variety of abilities. They are armed (primarily with energy weapons and restraining devices), capable of flight, and can detect mutants at long range. They possess vast physical strength, and their bodies are highly resistant to damage. Some are able to alter their physical forms or re-assemble and reactivate themselves after they have been destroyed.
Some Sentinel variants have the ability to learn from their experiences, developing their defenses during an engagement. Several groups of the robots have been created or led by a single, massive Sentinel, called Master Mold.
Read more about this topic: Sentinel (comics)