If she is such a noob and you're not then how come you don't have any suggestions? Personally, I would go with incase.
i've been thinking about picking up one of these www.naturesleeve.com I don't have it yet, so I can't add any more advice
case-mate barely-there glossy black meet her requirements, but doesn't provide much (or any) drop protection. the incase slider is much bulkier but will do a better job on protection.