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.

His name means "Green" in Japanese. He is one of the many sons of Kentaro and Kiyomi, and was raised along with his older sisters Ginka and Kinka, who adore their little brother. He is very friendly and sociable for a Vine dragon, largely because of his family. He loves being part of a large family, and loves when his friends and family come to visit him. He is one of the strangest dragons in the colony, living underground for the most part, while his vines seek out nourishment. He has vividly bright red flowers to attract small animals, which he then eats along with the nearby plants. He met Mebana after she matured and decided to make her territory overlap his. This didn't really bother Ryokushoku, and he allowed it. He was thrilled when he found that she was friendly as well, and was instantly attracted to the beautiful little dragon. They began courting, and soon became mates. They love each other so much, and look forward to being together forever.