Asura

Asura (アスラ, Asura ?) is a summon in the Final Fantasy series. She has only appeared in one main game, but has appeared in some spin-offs.

Final Fantasy IV
Asura is the queen of Eidolons, and lives with Leviathan in the Feymarch. In order to obtain her as a summon, Cecil Harvey must go to the Feymarch with Rydia and speak to her. After battling and defeating her, she is obtained as a summon, and the party can speak to Leviathan and challenge him as well.

Asura is a healing summon and has a casting time of 1, costs 50 MP to cast in all releases of the game except the DS release, where summoning her costs 40 MP. When called, Asura casts one of three spells depending on which face is showing when summoned: if she shows her serene (Pale) face she casts Curaga on the party, if she shows her happy (Gray) face she will cast Raise, and if she shows her angry (Orange) face, she will cast Protect. In the original SNES release the angry face casts Curaga and the serene face casts Cura, due to the Protect spell being removed from the game.

Lunar Asura fought in the Advance and The Complete Collection releases acts similar to her counterpart in battle. Her summon Grimoire does 9,999 points of damage to all enemies and has no healing effects.

Final Fantasy IV -Interlude-
Asura returns as a Summon spell for Rydia in the sequel of Final Fantasy IV and functions the same way as before. Asura's Boon will randomly casts one of three spells: Curaga, Raise, or Protect on all party members at the cost of 50 MP. She is only available during the final battle.

Final Fantasy IV: The After Years
Asura becomes available as a summon when the player defeats her in the Depths when Rydia is in the party.