There are three types of Knights. The first has the same color palette as Farrels and only uses a basic melee attack. The second has the same color palette as Wallace and uses a dropping attack identical to the Shovel Drop alongside the melee attack. The third kind wears golden armor and can perform a charge attack along with the previous two attacks.
Notably, despite being in combat, enemy Knights always have their visors up, while the common wandering NPCs always have their visor closed.
Upon defeat, they only get knocked away and do not drop anything.