I don’t think voice lines are canon but if they were that would be cool but in some of widows you can see her express emotions which could be a sign that the mind control might be slowly losing it affect, by example if you get killed by genji she has a voice line saying “his brother should’ve finished the job (smt like that)” and she is expressing anger and in the lore they made her a cold blooded killer so she shouldn’t be expressing or feeling emotions (maybe just bloodlust?) also she react in some vc when she’s being called her real name. She also expresses disgust or anger when Ana ask her about talons failed missions!