Naiads

Naiads are water spirits who can inhabit several different planes of existence.

Abilities
A naiad's lifespan is variable. Their special abilities are flight, not needing to breathe, healing influence (they can speed up natural healing processes, but not by a lot), and the ability to travel between bodies of water on different planes. Their health depends on the body of water each naiad is linked to. If it dries out, they die, if it's polluted their bodies become diseased, etc. They are human-looking, though they have very bright eyes and move with inhuman fluidity. They "bleed" water. they rarely stray from water unless they absolutely have to. Damage to their bodies doesn't slow them down, and they can repair themselves quickly. Dehydration hits them hard. The state of their river affects their minds, meaning something like a flood can put them into a frenzy, or freezing over forces them to hibernate. Their true form is a serpentine creature covered in iridescent scales. Their heads are doglike, and they have four clawed feet like those of a bird. They can have children with other races, but not each other. Their primary language is Aquan.