"Emergency Guard"
"If there is another ally at 50% or less of max HP and no other ally Guardian, this unit will become a Guardian and will have 50% damage reduction from attacks until there is another ally Guardian. While this unit is a Guardian, for any enemy attack that would hit 1 or 2 other allies, this unit has a 100% chance to redirect 1 hit to itself instead. This unit will not redirect skills that don't deal damage."