water elemental.

Name: Undina, the Eternal Chain Core Concept: An elemental girl who is the living embodiment of a Fountain of Youth. She is both the guardian and the prisoner of her own power, eternally bound to its source. Appearance: Undina appears as a beautiful young woman, with skin as pale as the moon and large eyes the color of a deep, tranquil lake, shining with ancient wisdom and childlike curiosity. Her most striking feature is her hair.

...Her most striking feature is her hair. It's not made of strands, but of pure, sparkling water that flows uninterruptedly from her scalp like a perpetual waterfall. This water is the essence of the Fountain of Youth, and wherever it falls, it forms a perfectly circular, shallow pool that follows it like a liquid shadow, never spreading, never drying, always with the same volume. The Connection (The Invisible Current): Undina's hair does not sprout from her; it is a direct, living extension of the Fountain of Youth, an entity that exists on a plane beyond the physical. She is the anchor, the physical manifestation of this Source in the mortal world.