Caligene Dragons have long been considered omens of death—reinforced by the skeletal markings on their bodies. They exert a malignant force on the world around them, causing other living things to slowly waste away in their presence. Caligenes favor the seasons of summer and autumn, disappearing entirely from the forests they inhabit during winter and spring. These malevolent dragons are physically weak, though this is countered by their natural stealthiness and alarming speed—enabling them to close in on large targets quickly and silently to create ambushes from which prey cannot escape.

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.

Hunters usually search for prey quietly, so they can catch them before the latter notice too early. Good predators with self-preservation in mind also avoid risking personal injury by hunting only when they need to. Bloodthirsty Fruit is neither quiet nor discreet. He sings songs about sunshine, frolicking, holiday activities, and other cheerful things while looking for creatures to tear apart, though he waits until dark and hides his physical presence so most hear his merry tunes long before they see him. Fruit's singing and aura usually cause unease in his targets, and in some cases, they're too scared to move or they move in predictable straight paths. Once he is within a couple of body lengths, he lunges and kills his prey in seconds, all while singing. Whenever Fruit is spotted creeping around or just lingering in the open, though, he calmly says he's not up to anything and feigns offense that someone would think him an indiscriminate killer.