About the website pics ...
My favourite is the one where she is wearing a grey sweater and black shorts.
It is definitely Rika an captures her best. Very natural pic.
The bunny ears pic is definitely Rika but a bit filtered.
The one where she has the designer jacket is definitely Rika but a bit filtered.
The other pics where she has red hair? I think its Rika but with a different hairstyle and heavily filtered, but it doesn't give a very accurate impression of what to expect. The body looks like Rika, slim and with long legs, but her skin tone is more tanned.