Prism Rain (レインボウシャワー Reinbou Shawā , lit. "Rainbow Shower") is a technique exclusive to Aqua in Kingdom Hearts Birth by Sleep. The attack consists of firing a salvo of rainbow-colored orbs at the targets.
In Kingdom Hearts Birth by Sleep, Prism Rain is a Shotlock that has a maximum level of 5 and max lock of 16. After the initial volley, the player can perform extra attacks by pressing in a timely manner to fire additional projectiles, based on the player's timing rating.
 Learning Prism Rain
 Kingdom Hearts Birth by Sleep
A prism is a small glass that is used to refract light into its seven component colors. The component colors of light match the colors of the Prism Rain bursts.