I think they complement each other quite well. The princess has a more kind/open hearted vibe to her in which she’ll genuinely listen to others concern, whereas, because the male MC has been “perfect” in everything he does since young, he’s more conservative. She will eventually help him become more understanding and he will help her with how the real world really works i.e. it’s hardships, but also things that are good. The little brother is the best of both worlds and the dynamic between the three is great.