Faith

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

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 358/2 Days

 * Mickey Mouse uses Holy as his Limit Break.

Kingdom Hearts Birth By Sleep

 * Ventus has Faith as a Deck Command. In this incarnation, it heals the user as well as inflicting damage.

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