Both my bikes are Commencals as they have a nice short top tube, and assuming that you drop the saddle the 2″ needed then the position should be fairly upright too. I’m 5’6″ (female) and have a small Meta 5 and a Supernormal. Love them both. But +1 on the girly saddle.
I would say great, is good that you will loan her your bike – when I wanted to start riding I got hubbys 30yr old rigid diamond back. 19″ frame, straight bars, felt like I was on a gate! Graduated onto full sus a couple of years later and suddenly realised what fun it all was 🙂