Royal Crimson Dragons are so named due to their massive size and confident, regal bearing. Most of the time they are laid back, ignoring non-prey creatures smaller than themselves, although they will occasionally take fresh kills from other dragons as a reminder of their place in the social order. Although there are few other dragons large enough to pose a threat to Royal Crimsons, they have little tolerance for potential rivals and will fiercely defend their territory from such intruders.

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.

The daughter of Nitric and Hydrochloric Acid, Aqua Regia is even worse than her parents. She's oddly aggressive for her kind and especially vicious to Gold, the royal leader of the Periodic Clan, having been trained by her mother specifically to defeat him. After she first fought him and won quite spectacularly, she took over the Clan for a short time and terrorized the other elementals, which still haunts Gold to this day. Nowadays, though she's no longer much of a threat thanks to the Platinum Order, Aqua Regia is still feared all across the Clan because of her bad temper and habit of being violent "just because".