Kaistern

The Blue Dragon Officer, Kaistern travels around the world as a diplomat with other countries on the continent of Dusis. He is the closest to Rath and the Dragon/Demon dog Crewger, taking Crewger along on several of his trips. He has spent the last several years searching for the mystical Wind Dragon in a desperate effort to save Rath, whom he cares deeply for, acting as a joint mentor-father-therapist for the Knight of Fire. Kaistern would (and, indeed, does) lay everything on the line for Rath, and although he is the only one who Rath tells everything to, he never truly is let in by the Knight, no matter how hard he has tried to be accepted. After being poisoned by demon water, he gives up his lifeforce to help resurrect Rath. (Source: Wikipedia)