Horse Dragons have equine-shaped bodies and hooves instead of claws, which allow them to be fast runners. They specialize in running takeoffs, which are quicker than taking off from a stand-still. Horse dragons are able to stalk their prey from the ground then quickly execute an aerial attack for the kill.

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.

Sagari Shinryuu is a strong and majestic dragon. His egg-mates are Toyotama Honor, Hayabusa Ikeda, Tsukiko Shinu, Akari Kumorihime, and Toshiaki Katou. Elected a general of attack at a very young age, he spends most of his time with Sora Ginirokumo, general of defense, and Reikoku Kurasu de Kassia the Cave-Lord. Strong and fearless, he lived for nothing but some far off battle and spent endless hours trainning himself and the other males. Four egg-years after reaching adulthood he found another reason to defend the caves. Sagari fell in love with his egg-mate Toyotama. After a short courtship they became mates and had a young son. Taneuma became his father's pride and joy. He took after his father at being very good at planning military attacks and had great strength. Despite their great love for their first born Sagari and Toyotama waited many egg-years before they had more little ones.