The Sun Sacrament is a revered Hikari ritual dedicated to the Sun-God. This sacred ceremony grants participants the ability to transform into a bird, symbolizing divine favor and a deep connection to their heritage. The bird's form varies based on the individual's traits and the Sun-God's will, but it always embodies graceful flight.

Transforming into a bird is the ultimate blessing from the Sun-God, representing freedom, enlightenment, and a higher state of being. Birds, with their ability to soar, are seen as closer to the divine, embodying the Sun-God's qualities of vision, swiftness, and beauty. The Sun Sacrament enhances both the physical and spiritual status of the Hikari, marking them as chosen and blessed.

Before the ceremony, aspirants must complete challenging quests testing their strength, wisdom, devotion, and purity to prove themselves worthy of the blessing.