Gold dragons are the ones most often killed by humans, who consider their scales to be extremely valuable. These golden scales grant them a high level of protection, similar to armor, and they use this to their advantage in battle.

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.

Thesaurus is a strong and presumptuous dragon who is also known as "The Master of Lies" by inventing stories of heroic deeds that he never did or for inventing things to purposely harm others. He also finds himself very funny and is known for his bad jokes and weird sense of humor.

Sarcastic and ironic, he usually acts like a complete jerk who likes to show off. He also likes to lie down and roll in the hot sunshine to warm up and let his scales see even more beautiful and bright, and eventually he acts clumsily when caught off guard or near some few females in particular.