Eve's an alum now, but just in case -- she's half witch and half demon and if she and Illyria ever meet up she is SO free to recognize that fact.

Sean is a townie, so they might meet. He's a sorcerer, so he's human but she'd quite likely definitely notice that he's not NORMAL human because hi, user of magic.

Hope Adams? Half-demon and TOTALLY up for that fact being recognized. And her father's a demon named Lucifer. (Of course, in her canon, he's not the Devil, just another demon. But whatever. Play with it!)