So now I�m confused… neither of your answers state that she did in fact cover her hair. Does that mean she didn�t? Or that you don�t know? And what do you mean that hardly anyone saw her? Wasn�t their house open with constant streams of people as is the case with Gedolim, great rabbeim and people who live for the kehilla? Didn�t they have hundreds of shabbos guests? Didn�t the females who where desperate for Brachos and chizuk find a place at her door?
I ask because this is all I know about any and every great tzaddik in litvish and Chassidik circles, past and present, so I always assumed it was the same by the Lubavitche rebbe and Rebbetzin.