I'm not in your area but I do carry pepper spray... and a cell phone, for whatever that is worth BUT, IMHO, it's really important for her to learn how to change her own tubes, use a pump (or co2) and not be afraid to break a nail or get a lil' dirty. It'll 'empower' her and she'll feel more confident and be more inclined to ride solo.

Be safe! Have Fun!
All the best