The Sylphs are the elementals of Air, the direction of East. To me they are faeries with butterfly wings. Fire is for strength, lust, passion, strong emotion, creativity and purification. The Salamanders are the elementals of Fire, the direction South. To me they are Salamanders or lizards but to others they are dragons.
Water is love, friendship, emotion, balance, and intuition.
The Undines are the elementals of Water, the direction of West. They are the mermaid type beings. Earth is fertility, money, stability, strength and tranquility. The Gnomes are the elementals of Earth, the direction of North. Elementals are on the spiritual or astral plane.