I Gotta Shift Into Blueberry Mode

To go on about how she's breaking the norms, she resents her mother's brutal ways, has empathy for the way the woman she hated the most was raised in trauma by her own mother, and understands that the Lolthite way of life is the pathway to becoming a corpse in the name of a god that doesn't care about you. Most Lolthites wouldn't blink at this. I see Minthara as an ex-Lolthite drow woman on the cusp of major change but we didn't get to see that come to fruition over the course of her story. Coranzan was also a Menzoberanyr commoner, and while he wasn't perpetuating things quite to the level Minthara was, he was part of Keptolo's scheme to draw men to Lolth's side on a large scale, making him another cog in the system perpetuating the abuse cycle against his own people and his own gender in Lolth's name. It took a similar realization that these gods will leave you for dead despite having made their schemes your life's goal.

Coranzan was given the opportunity to redeem himself by turning to Eilistraee and strongly believes that others should be given that chance as well, Eilistraeen or not. And naturally when Minthara joins and he understands she's rejected Lolth, he takes it as his duty to help her survive her new life as an exile. He sticks to her side, draws her into the group so she's not isolated, and generally won't leave her be as drow often flounder on their own, becoming isolated or hated by surface folk.

He demonstrates a dedication to supporting her and protecting her rather than preaching to her, and I think that strengthens his case. His dedication is returned by their own - their differences over what to do with the Absolute is met with a mutual understanding on the enemy at hand and a stubborn care for one another.

Over the course of staying close to her, he sees Minthara as an incredibly charismatic and witty personality with a sense of humor that can destroy him. Being an eloquence bard himself, he matches her sense of humor and enjoys a back-and-forth with her he hasn't experienced in a very long time. They enjoy trading barbs back and forth, brutally eviscerating each other, and telling jokes that makes the rest of the camp cringe hard.

Where Coranzan and Minthara weren't likely to work together was over the fact that they would struggle to reveal their hearts to each other, despite their feelings - they've both had their hearts hurt for loving others and they are Menzoberranyr drow, of course - it's not easy for them.

However, in this case, they have the tadpole to communicate their feelings and get past their walls and facades. Minthara and he share a rare moment of vulnerability that would take decades of trust otherwise. She initiates this by seeking out his thoughts, apologizing, and then seeking permission to see his thoughts. Not many drow women would ask for this - Eilistraeen or Lolthite. It's huge to him that she asks... but also that she wants to know his feelings - it's clear she values his thoughts and opinions, despite her tough exterior. And this is more than he gets from a lot of drow women.