"Was it just another performance?"

TV The NYT has a profile of the mighty Tatiana Maslany on the occasion of the new series of Orphan Black. I've italicised one interesting nugget:

"Wavy-­haired and theatrically dirty, Maslany spoke in Sarah’s lower-class British accent between takes. (She kept it up until they broke for lunch.) She was warm and self-­assured and modest and frank. She exuded a contagious ease. In our very first conversation, we bonded over the unsung virtues of the adult onesie. “I had one that had the butt-­flap until after high school,” she told me. I was as charmed as I was suspicious. Was it just another performance? Or an admission that she would prefer to be covered up?"

If I draw anything from the piece it's that in order to play each of these characters it's almost as though she becomes a different actress for each, that they're a performance shelled within a performance with the real Maslany hidden or obscured still further beneath.