Green Requiem

Green Requiem are enemies from Kingdom Hearts and Kingdom Hearts: Chain of Memories.

Green Requiem are members of a strange family of artificial Heartless. Almost every Heartless in the family (with the exception of Wizards and Bookmasters) shares a common trait: They look very much like Vivi, and all have names referring to their color and a form of music. A requiem is a piece of music composed to honor a dead person. The name fits the Green Requiem nicely.

Green Requiem utilize Cure magic, and are resistant to all other forms of magic. They tend to fly really high, just out of Sora's reach. Like their relatives, Green Requiem are most common in Wonderland, or at least once the Hollow Bastion keyhole is revealed.

Kingdom Hearts
''Spellcasting Heartless. They heal themselves and other Heartless with Cure. They are slow-moving, but hover in the air and absorb most magic attacks.''

Kingdom Hearts: Chain of Memories
''A magic-wielding Heartless that drifts through the air.It's doesn't attack, but it can cast Cure to heal other Heartless. The Green Requim is slow, but its immunity to magic attacks makes it tough to squash.''

Trivia

 * Though their attacks are not related, Emerald Blues look a lot like Green Requiem.
 * The role of the Green Requiem in Kingdom Hearts is taken over by the Crescendo in Kingdom Hearts II