Does she prefer pistols over revolvers?
Does she have any experience or training in how to operate a firearm?
Does she know how to clear a jam?
Are her fingers, hands, and arms strong enough to retract the slide and to load the magazines?
Is it for keeping in the home or should it be suitable for carrying around?
If she plans to carry, has she taken any defensive pistol training courses?
You need to put your request for suggestions into meaningful context.
Also, this type of thread topic does not belong in this sub-forum.