Undomiel is one of the six Keykeepers. She guards the Keystone of Light and resides at the Bridge of Hope. She's often considered to be the most powerful of the Keykeepers, likely due to her and her "brother", Volstgalph, being the oldest of the Keykeepers. Undomiel takes the form of a giant but beautiful female face, appearing in the sky above those that enter the Bridge of Hope. Those that came to take away the Light Keystone find it very hard to continue according to their plans after seeing Undomiel, as no one wishes to do anything against her wish. That makes Undomiel a formidable opponent.