Grant Regen and Protect to user.
Mediguard is a Sentinel ability. While using Mediguard the damage reduction percentage increases by 20 while simultaneously recovering HP. Each stocked Mediguard command recovers an additional ca. 4% of max HP. AI-controlled Sentinels use Mediguard if their HP is around half full.
It can be learned by Noel (role level 3), Calautidon (level 54), Flandit (level 87), Goblin Chieftain (level 34), Lancer (level 1), Pulse Knight (level 12), Silver Chocobo (level 29), and Snow (level 1).
Mediguard was made into a defensive ability which can be assigned to any garb, provided it doesn't have four locked abilities. Mediguard requires a certain amount of ATB points to be activated and prolonged use drains Lightning's ATB gauge. Since all abilities can be leveled up through their constant usage, Mediguard can reduce more physical and magic damage on higher levels while still healing its user.