Coretta is the child of a genetics researcher and a psychic operator from the Lone Star Coalition State. Her parents noted their child's special "gift" at an early age, and did their best to provide her with a normal and well-rounded education in the atypical environment of Lone Star City in spite of her special needs/talents..
When it was her time to take her place in the world as a CS citizen, there was only one path open to her - to join the ranks of the Psi-Stalkers. Any other path would lead her out of the CS, and make her into an outlaw until the end of her days.
Without bitterness or resentment for what must be done, she embraced her lot in life. This positive outlook (especially for a psi-vampire) is a product of the loving and nuturing environment in which she was raised.
This does not mean that Coretta is soft or weak. She has been trained well, and her instincts are to hunger. However, her identity & her spirit are larger than the hand she was dealt.
She has a big heart, and she won't back down from that which is clearly wrong.
Her instict is to hunger in ways that are alien to civilized people, and for that she walks the quiet walk of the wolf - forever a stranger to the gardens of CS civilization.
As a Stalker on the edge of humanity, she strives to represent all that is good about humankind, even if civilized human life in the Coalition States can never be hers. She is a she-wolf amongst humans, fighting on the edge between humankind and that which is hateful to all that is human.