White Dragons are pacifists and specialize in extremely strong healing magic. The only limit of this magic is that it can’t bring back the dead. They only eat plants and never kill living things.

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.

Yannaia's healing expertise is curing and preventing infections.  With a feather-light touch, she works her magic on inflamed wounds and feverish bodies to purify the patient's system and restore it to health.  While she cannot cause dead tissue or lost limbs to grow back, she does get a body healthy enough that whatever it would naturally grow, it does.  

Yannaia has been frustrated by the number of patients she tends that could have avoided infection with some simple precautions, so she is a firm advocate of personal hygiene and bodily substance isolation procedures.  Often she lectures patients and those who bring them in about the importance of cleanliness and personal protective gear.  Most consider her help well worth the earful of advice, and many do follow her advice to prevent recurrence of the infection.  Thus Yannaia not only heals, but keeps her world healthier to begin with through prevention.