Dark green dragons, once they mature, appear to become an entirely different species. However, this isn’t true. Rather, they burrow underground and get nutrients from their vines. These vines are sometimes referred to as Dragon Grass. These dragons are very violent, and will use their vines to capture, kill, and eat anything that moves, as well as nearby plants. Luckily, their range is limited and they cannot use magic. Dark green dragons tend to be easy to spot since they usually kill all plants around them and thus are usually surrounded by a large clearing.

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.

Kawaii Maigo was found by his owner, when he still was a young abandoned hatchling. He was named "Kawaii Maigo" because he was a "lost child" before he was adopted by his new owner, these words are Japanese and mean "a cute lost child". As a hatchling, he already loved to hunt smaller animals and insects with his ranks and was sometimes difficult to handle. Though he remembered that he would have died if his owner had not adopted him, so in the end he would always obey. When he grew up to his full size, he is mostly hiding under the ground, eating everything that's near him. His owner loves flowers, but since Kawaii Maigo grew up, she never plants flowers and other plants near him.