just incase you actually wanted a reply:
so like kids start developing their sense of morality at an early age and see how people behave around them. they see what behaviour they like and dislike and while some kids see what is "acceptable" and do what their direct adults do, (that bratty brother for example) some kids have innately more empathy and grow up to be what is socially called "nice people". Lorraine spent a lot of time with tia and that little kid and has her own experiences out of her direct family that are way different from her brother and like, her parents haven't pushed the narcissistic agenda onto her as much as they did to their son. we also see a huge sibling and parent disparity in the father lines where the first born guy is an asshole but as they get younger, they're more sensible and "smart". sooo while this could be just a setting in the story, it is not senseless all that much.
i speak from personal experience with my direct family and as someone that studied psych :3 hope this makes sense even a little bit, I'm not that great at explaining T^T
Bcos nobility doesn't raise their children. The children are raised by nannies, even milk are from nannies.(〜￣△￣)〜
Y'know how tf did she bring such a cutie and polite girl. Like make it make sense