Well naturally she'd be doing typical knight errant stuff, but in order to best make use of her skills and talents most efficiently, here's what I propose:

One thing Fran would endorse is making sure folks can take care of themselves. Wouldn't do Fran any good if people are too reliant on her help. To that end what she does best is fight, and thus she would spend a considerable out t of her time training folks in basic combat and drills. She'd use a combination of her noble status to ensure folks understand she's no shame, as well as her persuasion to convi ce more timid folks into giving it a try. But in particular she won't just rely on her charms: she is more than willing to train alongside these men and women and show them her strength, and typically will get them started some something easy such as quarter staves.

So in short, how about a persuasion check using strength to train folks?