Regen (status)

Regen (リジェネ, Rijene) is a recurring White Magic spell that constantly restores HP at a set interval. Characters afflicted by Regen gradually recover HP over time, however, it has the exact opposite effect if the character is undead, where it gradually reduces one's HP, as if poisoned. This also applies to enemies, meaning that casting Regen on an Undead will cause it to lose HP. In other cases, Regen does not work at all against an Undead. Regen is the opposite of Seizure.

Final Fantasy Tactics Advance
Auto-Regen is available to Hunters and Snipers as Reaction Abilities. A Defender's Aura skill bestows Regen along with Auto-Life. The Summoner's summon, Kirin, bestows Regen in an area.

Final Fantasy Tactics A2: Grimoire of the Rift
Regen is a buff that gives the targeted unit 1/10th of its max HP (rounded down). In addition to being a reaction ability for Hunters and Snipers, it is also a clan benefit that can be chosen before each battle upon earning the clan title "Journeymen", and there are also the stronger versions of this Clan Privilege called Regenra and Regenegra. It can be learned as an action ability by many characters, but often isn't called Regen. Notable examples include Hurdy, who can learn the skill Angelsong from the Hurdy-Gurdy instrument that casts Regen on the target, and Adelle, who can use the skill Adelaide as a Heritor to cast Regen on the target as well.

Dissidia Final Fantasy
Regen is a status effect shared by all characters when entering EX Mode. It can also raise Bravery over time during EX Mode if the "Brave Regen" ability is equipped.

It is also a story mode skill that recovers 5% of the character's total HP whenever his Home Area changes. It continues over all the levels of the story.