Moldorian: Hikari to Yami no Sister (1994)

In the village of Keuzon within the Human Realm of Moldoria lives a boy named Navarre, shunned by his peers as a coward and weakling. His only real companion is Miria, his friend since childhood. One day, goaded by a village boy, Navarre ventures with Miria to a cave near the village to prove his strength. But unbeknownst to any of them, dark forces are at work upon the land, and Navarre will soon find himself swept up in an adventure beyond his imagination…