Elemental

An elemental is a person who has inherited (either by blood or by some other means) elemental powers. This person could've formerly been human before their powers were activated.

Types
There are various types of elementals, but they tend to fall into the four distinct elements: There are subcategories for each of these, such as lava, ice, nature or plants, and lightning. There are also two other elements that don't show up: light and darkness.
 * Fire
 * Water 
 * Earth 
 * Air

Activation
An elemental's powers are usually brought out in times of need, such as an attack or life-threatening situation in which they need to protect either themselves or those they love. However, not all elementals find their powers this way.

If their elemental powers are purely linked to their emotions, powers can be activated by a strong feeling that corresponds with the element, such as love, anger, protectiveness, or hate.