A being not alive, yet not dead. This elemental creature is one of her kind, controlling the psychic, water, earth, wind and fire powers. Her power is limited due to an everlasting spell, therefore she can't use all of her powers at once.
She can be quiet and calm or loud and aggressive - it all depends on her mood.
A gem on her forehead, psychic powers, a limiting spell.
Side notes: She can't speak, but she uses telepathy using two channels - the public channel and the private channel. The public is nearly like talking without opening the mouth, and the private... Well, you figured it.