Undine Dragons are named for the water spirits with which they share territory. They have close relationships with these spirits, and are able to communicate with them. In exchange for protection and respect of their mutual freshwater homes, laid eggs are often protected by a blessing. This blessing stays with the dragon into adulthood, and with it they gain potent magical abilities. Sometimes when an Undine Dragon becomes very upset, the ground at their feet may frost over or begin to steam. They have also been observed to manipulate water directly, rerouting raindrops or creating puddles from groundwater. Undine Dragons always live near forest pools, streams, or waterfalls. Both genders take equal part in the raising of young and are very good parents—though they may not remain mated after the offspring are grown.

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.

Aga'ao is a sympathetic and caring dragon, using her magic to control and manipulate water to help those in need.

If she comes across a dehydrated animal or human, she'll dig a small hole and draw water from deep within the ground to create a small pool of water. Being an Undine dragon, she's able to "purify" the water to make it safe enough to drink.

There is always an occasional forest fire near Aga'ao's home, which is a a small clearing surrounded by dense shrubs and trees. In order to protect the surrounding vegetation, she will go to the closest pond or lake to take some of its water to put out the fire.

She had taken an interest in "gardening", as she can be found watering the flowers around the forest clearing she lives in.