Mia is the missing wife of Ethan who is the protagonist for Resident Evil 7.
For reason unknown Mia disappeared without warning from Ethan’s life. Her husband Ethan tracks down her whereabouts to the Baker Family home where she is supposedly being held captive.
From what we have seen from the ‘Lantern” gameplay trailer, Mia has very little in the way of skills. She is able to hide and use limited stealth techniques.