Cassare Dragons are known for their magic-deadening abilities. Though not a conscious ability, a large field surrounds the dragon through which magic is passively nullified. This field is strongest near the dragon itself, and falls off with distance. The absence of magic often makes other creatures avoid them, though some will have the opposite reaction and seek refuge instead. It has also caused them to be hunted, as though the field is severely weakened once dead, their bones and scales retain some of the effect. Possessing such an item is considered a necessity by those who expect to face hostile magic.

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.

Hycsy, like most Cassares, has a magic-deadening field around her. Because of this, she has little problem telling Zaau's fake prey apart from real prey, and saving multiple lives of dragons by warning them about the traps the bloodthirsty Magi sets up. When not tracking Zaau and her traps down, this lively Cassare dragon is hanging with her friends, usually Sun H0lder, Cakkco Edo'j Najx, and Kne Couv Sceloh. She can be rather hyper at times, but cautious all the same. She usually has a large smile plastered on her face, and when she isn't happy something is usually very wrong, such as a life-threatening situation. However, she isn't always the brightest Cassare in the Cassare box, and is rather forgetful.