the silly thing is that, the only game that had the symbolic red butterfly in it was fatal from 2, which is what yui is cosplaying. the other games (i'm pretty sure) don't have any red butterflies that have any real significance other than just being...there. so i find it weird that all five of them have a butterfly. it would've been better just to leave it out entirely.
and i always though that rei had dark blue shoes, not... whatever color that is.