There is unverified information that Minthara was voiced by the same actress who voiced the female version of Commander Shepard - Jennifer Hale
https://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


Thanks to Larian for Baldurs Gate 3 and the reaction to player feedback