Hero Beasts (勇獣, Yuju) are a race of ancient highly intelligent creatures which have existed alongside humans since the neolithic ages. They are extremely powerful and skilled in fighting, each having a multitude of unique powers and abilities, and unnlike mysterious beings, hero beasts are extremely intelligent, perceptive creatures which are capable of human reasoning. They are considered mankinds best friends, and many sanctuary's across the world have been raised in dedication to feeding, caretaking, safekeeping and bonding with hero beasts.