At least I can say that I have all three versions
of Riho (her three outfits).  well, excepting the
bikini she was wearing in the home movie she was
watching in Ep 12, but none of those shots are too
good anyway.

I'm partial to "schoolgirl" Riho myself (eps 1-4,
when she had blue eyes), but I don't mind the
yellow/red dress she has later.  Actually, the
character designs got a lot better after ep 4 when
they changed, so the art is actually better after
she has the red/yellow dress.

I wanted to severely hurt Cain for messing with
Riho in ep 4 ;_;

I think I have an unhealthy attachment to Riho for
some reason ^_^;;