The Asrai can be described as an aquatic fairy, and can resemble the Selkie. In appearance, it is said that the asrai can look like a beautiful young maiden, sometimes as youthful as children. In actuality, they can live to be hundreds of years old. Asrai's can appear to have webbed feet or hands.

It is believed that if an Asrai is caught or even touches sunlight they will die and melt into a pool of water. In some Lore their touch leaves your skin (where they made contact) forever cool; never able to be as heated as the rest of your body.

Further Details:

In English folklore an Asrai is a type of aquatic fairy, similar in some ways to mermaids, nixies, selkies, sirens or morgens. Some sources describe them as timid and shy, standing only between 2 and 4 feet tall, while others depict them as tall and lithe. They are said to look like beautiful young maidens, sometimes as young as children, while actually being hundreds of years old. They may have webbed hands and feet, resembling some descriptions of selkies.
If an Asrai is seen by a man, her beauty is so great that, according to folklore, the man will instantly wish to capture her. The Asrai are as deathly afraid of capture as they are of the sun, for if captured or if even a single ray of sunlight touches them, it is said that they die and turn into a pool of water.
The tale told of one fisherman who caught an Asrai claims that the touch of her skin was so cold, that where the Asrai touched his arm while pleading for her freedom -- and her life -- the flesh has never been warm since. Their inability to survive daylight is similar to that of the Scottish Fuath.