Esuna

Esuna (エスナ) is a technique that appears in Kingdom Hearts Birth by Sleep and Kingdom Hearts Re:coded. It allows the user to remove all negative Status Effects.

In Kingdom Hearts Birth by Sleep, when Esuna is used, small orange orbs bob around the user, who emits an orange aura. In Kingdom Hearts Re:coded, small blue orbs appear around the user, who emits an orange aura.

Kingdom Hearts Birth by Sleep
In Kingdom Hearts Birth by Sleep, Esuna is an Advanced magic command that takes up one slot in the Command Deck and has a normal reload time of 15 seconds.

Kingdom Hearts Re:coded
In Kingdom Hearts Re:coded, Esuna is an magic command that has a memory consumption of 10% and a reload time of 11 seconds. Aside from curing the user's status, Esuna also restores a small amount of HP.

Kingdom Hearts Birth by Sleep

 * Terra, Ventus, and Aqua can purchase Esuna from the Command Shop for 600 munny once five worlds are cleared or the command has already been obtained elsewhere.

Kingdom Hearts Re:coded

 * Data-Sora can purchase Esuna from the Shop for 800 munny once the player has cleared Castle Oblivion.

Kingdom Hearts Re:coded

 * Esuna: Angel Star (Beginner mode)

Kingdom Hearts Birth by Sleep

 * Esuna (Terra): Chest in the Aqueduct at the Radiant Garden.

Origin
Esuna is a recurring white magic spell in the Final Fantasy series. When cast on a character, Esuna removes most abnormal status ailments.