Faith

Holy (ホーリー), sometimes dubbed as "Pearl" is an ability which appears in Kingdom Hearts Birth by Sleep, Kingdom Hearts: Chain of Memories and Kingdom Hearts II. It usually consists of a burst of white light, causing damage to everything in range.

Kingdom Hearts: Chain Of Memories

 * Sora learns Holy at level 42.

Kingdom Hearts Re: Chain Of Memories

 * Sora learns Holy at level 47

Kingdom Hearts II

 * Mickey Mouse uses "Pearl" as an Action Ability.

Kingdom Hearts Birth By Sleep

 * Ventus has Holy as a Deck Command.

Etymology
Holy is a recurring spell in the Final Fantasy series. In all games, Holy has the distinction of being the only White Magic spell to be used as an offensive weapon. Its divine power is most effective against both dark-aligned and undead creatures.