The water spirit looks like an adult woman, long flowing hair, long light dress, and a beautiful face, except it's all made of water. Being made of water has some pros, like being able to pass through fences or nets, glimmering in the sunlight, and being able to produce endless water at will.
She often helps the only human town in the forest of Veradious.
She didn't previously have a name, so the townspeople call her Vapor.
This is a fantasy world, so things like Elves, magic and dragons exist.