Parry. The knight adds 2 to its AC against one melee attack that would hit it. To do so, the knight must see the attacker and be wielding a melee weapon.

Knights are warriors who pledge service to rulers, religious orders, and noble causes. A knight's alignment determines the extent to which a pledge is honored. Whether undertaking a quest or patrolling a realm, a knight often travels with an entourage that includes squires and hirelings who are commoners.