Ridgewing Dragons live just below the snow level on the upper slopes of mountains. They are a friendly, playful breed and enjoy dancing in wind currents near their homes or plummeting down into valleys from great heights. Their wings, by far their most striking feature, grow in fin-like ridges along their backs. While their bodies lack markings to blend better with their surroundings, a ridgewing’s wings have bright markings in the colors of the flowers that grow in their mountain habitat. Occasionally different-colored individuals can be found, but they are rare because their striking coloring offers little protection.

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.

Ostrinine the Ridgewing Dragon is very friendly and wants everyone to be her friend. It's not difficult for people to want to be her friend in turn, considering her adorable personality and rather startling degree of beauty. She is excellent at comforting people, even though when she does she really wishes for someone to comfort her. She feels alone because she developed much faster than her hatch-mates Aenorell, Soarune and Jazpere, and wants someone to accompany her in her change. Every month or so she switches home between five locations she's picked out to be her bases. She is now paired with Equien as her life-mate.