Green Dragons are also sometimes called “earth” dragons. They usually live deep within caves, and have power over the earth. They are capable of launching boulders at high speeds, and can cause earthquakes by slamming down onto the ground.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Odua has a split personality. He is usually reserved, but when irritated, he goes on a rampage, causing many cave-ins. Ashamed of himself when he recovers, Odua spends most of his time in a secluded corner of the cave, glaring at passing dragons. He guards crystals rather than gold. He loves the purity of the "wood's wind", believing that its sound will cleanse the world of "filthy" humans. Ever since Alljobeasy stole some of his earth to nurture Mikeru, he has been acting as her guardian for Rihito. Sadly, he is a loner, so is oblivious about Mikeru's crush on him. He currently is concerned over her "mysterious illness" that is making her pine away.