Anyone can be the face, but a high CHA goes a long way. Sorcerer makes more sense to me, but there’s also multiclassing so maybe she can drop some more attributes to pump both INT and CHA, so she can mix sorcerer’s Metamagic with Wizard’s expanded spell options.
If it’s just you two, you can fill the other two slots of your party with companions. They also stay in your camp.
The rest I have no idea.
