An almost strictly nocturnal breed, Ciriax Lindwyrms are especially attuned to the moons’ cycles. They spend nights patrolling the edges of their territory, aggressively fending off intruders while they feast on their prey. After two or three nights of feeding, often around the time of at least one full moon, Ciriax Lindwyrms retreat to the recesses of their cave or underground homes. These dragons make it particularly difficult to travel on nights that are well-lit by moonlight, often to an unsuspecting adventurer’s dismay.

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.

Two-headed dragons are unique enough to deserve a separate classification from ordinary dragons. They have two necks, two brains, two mouths, but one stomach and one main body. The two heads usually work together, but there are times when they will fight each other, snapping back and forth. Their unique anatomy prevents them from breeding with single-headed dragons.

Behold, the Queens of night—Remilia and Flandre Scarlet, known as the "Scarlet Devil" among dragons and human. Like others of their breed, they hide in their dark cave in the day, and emerge to hunt at night. When the moons are full, they can often be seen flying in the sky, swaying their wings gracefully.

Remilia, the "leader" of the two heads, has personality mostly of a selfish child—self-centered and somewhat bratty, despite several hundred years of age. She claims to be the descendant of a certain great noble, but there is no proof, and most do not believe so.

Flandre has more destructive power than Remilia, mostly because she is sometimes insane, and tends to destroy anything and everything near her. When she is in a state of mental abnormality, they try to stay in the deepest parts of their cave to prevent destruction. She is usually rational and docile though, like an innocent young girl.

Despite their great differences, Remilia and Flandre love each other tremendously.