There is unverified information that Minthara was voiced by the same actress who voiced the female version of Commander Shepard - Jennifer Halehttps://jenniferhale.com
She also did voice acting for Baldurs Gate back in 1998
I wrote her this question, and I will let you know if she answers and confirms the information. Although the voice is very similar
I don't know what's led to this connection.
I've spent a lot of time listening to Jennifer Hale's acting (I've tended to actively seek out playing as characters she portrays).
I'm not aware of her ever "putting on a voice", but even if I'm listening for that, I can't hear her in Minthara at all. I would be very surprised if she's the actor.