Explorer Woman Ray (1989)

Original title: エクスプローラーウーマン・レイ

Professor and archeologist Rayna Kizuki holds an ancient artifact of the Ords given to her by her grandfather to protect. Two young girls, Mai and Mami, try to steal it from her in the hopes the artifact will lead them to treasure. But Rieg, a man who used to work with her grandfather, is also trying to get his hands on it, knowing the artifact actually holds the key to the ancient power of the Ords - a power of the light that not even the ancient people could control.