Ice Dragons are fierce predators who hunt using their extremely cold breath. The breath of an ice dragon can freeze its prey solid in seconds. The body of an ice dragon is so cold that icicles will form along its skin no matter the outside temperature.

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.

Named after the kun-yomi of the kanji letter "white", Haku is a good-natured and kind dragon. He hates to kill, even if it is only for hunting food. In a battle, he prefers to freeze his enemies until they cannot move without ending their lives. Usually, he runs away after immobilizing his opponents.

Furthermore, he believes that a dragon can become truly strong if they want to protect someone dear to them. For the sake of his beloved ones, Haku is able to suppress his emotions and use violence if it is necessary.