Ash is going to have complete amnesia and be a mage in this AU -- specifically, a mage with a strong penchant for technology. Digital libraries, spell forms and processes calculated by program, even working on developing a magical programming language that can itself cast simple spells.

She is also, please forgive the gendered insult, a cast-iron bitch. Her focus is entirely on advancement and development of magical power. She has as much heart as your average politician; only interested in people who she can get something out of. To that end, she's had several relationships that were entirely self-serving (e.g. Foster, Axel) and that she ended once they stopped giving her what she wanted out of them.

Despite her coldness and ambition, she maintains very close ties with every other mage she can, because she's well aware the biggest danger she risks is from her peers. Similarly, she always tries to approach others professionally, well aware than behaving like a jackass is going to accomplish nothing.

CR potential:

Exes -- especially anyone with anything supernatural about them.

Mages -- If you're a mage, Ash has attempted to establish a courteous professional relationship with you. I am going to request in her official background that she have a position of power and standing within the Circle, so she may be your boss!

Contacts -- other supernatural beings are of interest to her, in her efforts to learn and study, so she tries to get to know any of them.

Anything else -- A roommate? A current SO? An apprentice? Whatever!