Just noticed something about the costumes, perhaps some of them could also show how similar the relationships are which I am predicting will be like this.
Marie Rose and Helena = gothic lolita and her mistress = Mirai and Haruka
Honoka and Ayane = looks at each other like sisters / one girl looks after other = Hibari and Yagyu
Kasumi and Phase 4 = rivals = Asuka and Homura
Lei Fang and Hitomi = rich girl and rich girls friend = Ikagura and Yomi
And more
I think it is between Ayane and Hitomi being the Yagyu girl. They both have that similar front layer of hair style
who dat who dat
who dat who dat
who dat who dat
I G G Y
who dat who dat
rachel may be the physically strongest female..... ok but don't forget hayabusa :/Rachel getting Daidoju's costume make sense, due to each being the physically strongest of the cast.
rachel may be the physically strongest female..... ok but don't forget hayabusa :/