Guard Unit Ⓛ is a weapon panel linkable to any weapon with a link zone. Guard units increase the defense of the player character. The amount of increase varies between weapons. This unit is best used when all three abilities are already unlocked and they improve defense, such as Roxas with Zero Gear because his first two abilties raise defense greatly when low on health. These are avaliable in Kingdom Hearts 358/2 Days and can be found in a number of missions. They can also be obtained from the moogle shop under 'Buy' and can be obtained by Redeeming Challenge Sigils or Mission Crowns at the Moogle Shop.