isn't Sakuya dressed like Rei in the alternate evangelion?
and poor Sanae, why couldn't she be sexually harassed by classmate? Why must she be in the one where everybody dies... and dies... and dies... and then kill everybody... and dies...
That's only a school uniform it doesn't means she's actually in the series, lol, and even if that were the case I don't think she would die that easily being what she is. Also Rena only kills Teppei and Rina not "everybody".
At first I thought Sakuya's outfit vaguely resembles Yumizuka Satsuki's uniform, but the cravat and skirt are different colors, and there are other small differences.