Aderus Bats are an abundant species of flying mystics who reside in the Aderus Caverns. Often considered the family and directly linked ancestors of both Gongbat, these bright yellow Chiroptera are peaceful spirits who lack powerful defensive techniques, often fleeing when in the face of danger. In the main storyline, Hark and his team manage to kidnap an entire cargo ship full of them, and attempt to transport the group to his spirit museum.