Nyad

Deep in the waters of Arawyn’s rivers and seas live creatures known as Nyads, tricksters known for their general distaste towards the surface. Unpredictable as an ocean current, Nyads are known to do whatever it takes to get their way, even if it involves the loss of a friend. River nyads are typically kinder and more free-flowing than their deep-sea brethren, whose tumultuous and spiteful nature are a shock to most.
Nyads are formed of some kind of liquid-like compound that resembles – but is definitely not – water. They live in the northern rivers and often assume a solid form and appearance to do various things on land. Their skin and hair vary from light blue to aqua-marine when they are in this state. They are known for their general uncaring attitude toward land beings, but can be useful in some dirty dealings, due to their disinterest towards others. Nyads do whatever strikes them as useful or fun, depending on the circumstances.
Nyads are folk of the waters, and like the depths of the oceans they are totally foreign to most of the peoples of Arawyn. No race can even speculate on what their natural behavior is like. They are among the most unpredictable races as far as temperament is concerned. They often participate in “fun” activities and can act well, becoming whoever they need to be to get their way. Yet they do not mind the loss of others – even friends.