The Gifted Magi

Publisher's blurb:

Born and raised in Brockton, MA, she had a boring uneventful childhood, nothing of note until her senior year of High School. That year after an eldritch accident she became the apprentice of the mystic Dr. Stephanie Bizarre. She is a naturally gifted mystic and Mage, whose training was cut a little short due to the murder of her mentor. She was asked to join GUARD shortly after assisting them in closing an extra dimensional hole and battling a demon trapped in that dimension. She serves as the official GUARD advisor in all things mystic.