I think Kate is resilient and has a very supportive and loving family, her sister, brother and their partners haven't ever gossiped about the RF and they just seem like a tight knit unit, something to aspire to. Her parents seem rock solid.
The way Kate comes across, she is self-assured, confident and secure in herself. She is able to manage her emotions and conveys inner strength, silk glove iron fist. Meghan is strong-minded, opinionated and bold but doesn't manage her emotions well. She has a victim mentality, as has Harry. Kate lucked out with her parents.