Undine

Archives of Nethys
These dynamic, fluid mortals trace their ancestry to creatures from the Plane of Water, such as marids, water mephits, and brine dragons.
Undines often go through life in a series of shifting phases, their interests waxing, waning, or sometimes morphing altogether as old loves are discarded for new interests. Structure provides a much-needed focus to undines' lives, and without strong goals or support from those around them, undines can find themselves stagnating in feelings of despondence. Most undines feel they personify specific aspects of water, some seeing themselves with the strength and power of the waves, the speed and tenacity of a river current, or the calm of a peaceful lake or pond. Others identify with all these aspects and more, their demeanors shifting like the tides from one situation to the next.