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.

Armageddon is one of her tribe's deadliest warriors. She displayed her hunting prowess very quickly after hatching, which caused some of the fighters to take interest in her and ultimately start to train her. Upon maturity, she discovered her magical powers, and begun to experiment with them. When the elders realized just how strong her death mana was, they had a Cassare follow her around for awhile until she agreed to reel it in. She later joined the guards in patrolling the tribe's territory, wreaking havoc upon any foolish enough to attack her or her fellow guards.