

It's got some kind of love spell thing happening. "Mom, everyone at the Waffle Hut is shady. "Only my mom calls me Isolde, and even then, just when she's mad at me." "'Endeavor to be an alert seatmate'? Who says stuff like that?" "Yeah, what's with that? You don't strike me as the ghost-busting type." I read it on the Internet this afternoon." Her father was not deeply involved in her life until she came into her powers at the age of 12 due to issues between her parents. She's spent the first fifteen years of her life moving from place to place due to her mother's secret past. Sophie is the only daughter of Grace Mercer and James Atherton. Izzy is able to sense the presence of Prodigium. Sophie Mercer, a sarcastic teenage demon hybrid, is the main character of the Hex Hall series. She has red hair, pale skin, and green eyes.

She does not know how to properly interact with normal humans. Her mother has kept her shielded from the real world (high school, malls, etc.) and therefore Izzy is inexperienced when she has to enroll in high school to solve a case. She joins the Paranormal Management Society (or PMS) in School Spirits to crack a ghost case.

Izzy later appears in the spin-off series, School Spirits, as the main character. In the end, they have a close relationship that remained slightly awkward after they tried bonding. She and Sophie met in the forest, not knowing who the other was or that they were related, Izzy tried to kill her. Izzy is slightly rebellious and annoyed when people put her age before her, therefore ruining any of her chances to "get some action" in most of the fighting scenes.
