Black Dragons are warriors. They are strong and capable in battles of force, but also ample magic users, capable of devastating opponents with their spells. Their bright eyes give them excellent night vision, which is why they generally hunt during the night.

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.

Sue is the wife of Futeki Kakahashi and is the reason why the black dragon lineage flourished in the Kakahashi Clan. After her rebellion against her parents, Sue decided to be a wild dragon. However, when she was about to go into the forest, she saw Futeki and fell in love with him. They both shared the same preferences on things, and quickly became lovers. Now, Sue and Futeki are raising the black dragon blood within the Kakahashi clan. Sue is quite but loyal. She never backs down on a fight. She is very rough when it comes to obeying the rules. However, she has her soft side towards those who are young, old, or disabled. She is also almost as strong as her husband.