Durge whose nature is more on the feral side, where they're ferocious, but not cruel. The cruelty from before came from years of being shaped into the living weapon their Father would raze the world with.

Astarion seeing the ferocity of Durge, picking it apart from the cruelty of the blood whispers, and truly appreciating it. He sees Durge claw open a cultist and lick the blood from their claws without hesitation. Astarion is floored, and a little terrified, but it wins Durge a little more favor.

Durge and Astarion being creatures of the night, each a little ferocious in their own ways. Durge still enjoying ripping apart flesh with their claws, without fear they'll turn it on the wrong person. Astarion embracing his prey drive. Astarion and Durge hunting together, always keeping Astarion's hunger sated. They embrace their inner darkness, ultimately unleashing it to perform heroic deeds.