Gallia is one of the Primary Pallasites’ Four Heavenly Kings, armed with a Holy Sword known as the Bushin Photon Sword. Hyperion refers to her as ruthless, and will kill those who feel have not learned their proper lesson.
She manages to hold her own against the Gold Saints until the combined efforts of Paradox and Integra disrupt Europa’s technique to keep the Saints separated, and when Athena goes forward with the Gold Saints, her attempts to keep the goddess at bay are thwarted by the seven young Bronze Saints. Although she easily overpowers them, Subaru’s mysterious Cosmo disrupts her attack and damages the Bushin Photon Sword slightly. The other Bronze Saints are inspired to pool their powers of friendship and hope against Gallia, using the Omega Cosmo to empower their new Omega Cloths in finally defeating Gallia. Her Chronotector is the Photon Tector, which is modeled after the Cancer, Aquarius, and Pisces Gold Cloths.