Rock Shield Hilichurl Guards are Hilichurls equipped with a rock club and a Geo shield. When not attacking, they raise their shield to block incoming frontal attacks regardless of whether the attack is physical or elemental. They can still be struck by arrows from afar if caught off guard, and cannot block attacks from behind. However, if its shield is already raised, it will rotate to face the player, making a sneak attack from behind quite challenging in single-player mode.
The shield gives them a very high resistance to physical attacks and is considered a Geo object, therefore Geo attacks, Claymore attacks, Plunge attacks, and explosions are required to break them effectively.