This is just what I think anyway. There's no need to explain why they're underrated beauties, I'll just say what I like about their looks. Not sure for the placements though. Looking at my 列表 again, I noticed that they're also underrated characters, not just in the looks department.
10. Sissi (Princess Sissi)
What appeals to me about her appearance is that she's graceful and looks really feminine.
9. Chicha (The Emperor's New Groove)
I haven't heard anyone say this about her but I think she's so pretty, I absolutely 爱情 her eyes.