Feisty and energetic, Whiptail Dragons pride themselves on their speed and agility. It is not unusual to see several whiptails racing each other. Though fragile, they can easily evade attacks with their superior speed, and often use their long tails as a weapon, giving rise to their name.

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.

Bin-gu is very excitable, and loves to talk. Though his way of speaking is simple, other dragons enjoy listening to him and will often make up excuses to start a conversation with him. The reason is a bit strange: Bin-gu has a slight speech impediment, and pronounces "oh" as if it were "oo". He seems unaware of this fact, and happily chatters away to his friends about things like oak trees, mosquitos, or roses. The weather is another popular topic, especially during winter: "Oo, there was soo much snoo last night! I nearly frooze!"

Bin-gu also enjoys playing games. His favorite is a matching game which the other dragons taught him. It is played on a grid drawn on the cave floor, with small pictures inside each square. The objective is to fill four squares in a row. Bin-gu is quite good at this game, and suspects the other dragons sometimes let him win. They would never admit it, but it's worth losing a game or two to hear his excited voice calling out "Bingoo! Bingoo!"