If it were up to me I would get rid of both Amy and Susan but oh well...
Won't lie though; Amy has a beautiful butt though her personality is rotten..And Susan is so obssessed with being in control also her very existence makes me feel as a side kick for any female in the game regardless of who my favorite is (Rachel in this case).
There is also a weird thing I noticed about the writing, the dev has some issues with virginal characters, there are a lot of missed opportunities here.
Chloe for instance, I don't see why they had to make her a vaginally experienced girl, makes no sense since the MC tried so hard to get in her pants, it makes you feel like you had to do all that to have sex with her but some random loser got there first without even trying most likely, you see what I mean...
Update:
UPDATE 2: