Heather has a pretty defined personality. She's cheery and excited, sometimes using the text emote "^_^" in her dialogue. She is also the only character that expressed kindness towards Dad, showing concern over his well-being enough to actually risk her own life to help him. She's also the only character that requested to be "enlightened" By Dad fully willingly. Even though she herself heard Dad make bigoted remarks towards her, she does not seem to hold any sort of grudge against him for it