1.Rias

2.Sona

3.Ravel

4.Aika(in my opinion, one of the most beautiful girls ever)

5.Koneko

6.Asia

7.Isami

8.Grayfia

9.Xenovia

10.Akeno

11.Venelana

12.Tsubaki

13.Isabella(The second best beautiful girl in anime)

14.Yubelluna

15.Irina

16.Rossweisse

17.Yasaka

18.Tsunade(will be explained later)

19.Valarie(roar~)

20.Serafall