I love your microstory! It evoked a rich backstory of what could have unfolded to result in this scenario. Please consider my minor edits to see if they are worthy.
“Please! Give me a potion that’ll make me kind.”
“There is no such potion. I have no such spell. Magic cannot change a person’s nature."
“So… there’s no hope for me.”
"Kind is not what you are. It is what you do."
“It’s that simple?"
"It is that hard."