Hermione may develop a new sense of diplomacy through her friendship with Pansy. Since Pansy has a different way of handling situations, Hermione learns to approach things from a more Slytherin - like perspective at times. Pansy develops a softer side. She was probably known for her sharp tongue and haughty attitude, but with Hermione's influence, she becomes more empathetic. They both grow as characters, learning from each other's strengths and weaknesses, and this is often beautifully depicted in the fanfictions.
Well, Hermione often starts off being very skeptical of Pansy. She has her Gryffindor values and Pansy is a Slytherin, so there's that initial wariness. But as the story progresses, she might see Pansy's loyalty to her own friends in Slytherin and start to respect that. Pansy, on the other hand, might begin to admire Hermione's intelligence and courage. She might see that Hermione is not just a 'know - it - all' but someone who truly wants to make the wizarding world better.