She is fair, upright, amiable, warm-hearted, and symbolised by life, and the Cleric class. Always friendly and positive, Yustiel is loved and respected by all the lords in Elysea. She has a gentle, caring nature, and craves peace above all else. This often puts her at odds with Kaisinel.
Yustiel stays in Elysea out of obedience and faithfulness to Ariel, but she cares not where her home is. Her only wish is to end the war and go back to the time of ancient Atreia.
Later we learn she is trying to save Eltnen from being covered by the sand, and losing its Aether. So she invented Water Fountains called mystic springs and planted several of them in the region. She was able to stop further ruin of Eltnen. However the Lepharists trying to destroy these springs or poison the water. She wants bring back Eltnen's former glory as the food basket of Elysea. Her mystic spring can be seen in Theobomos at the Observatory Village.