Just to help, left to right:
Abigail/Abby - the sorority president in all but name (why Carol is the pres is beyond me) who tries to recruit Ashley and who gives Carol shit all the time. (Side note: looks way too old here, should be a MILF instead of a sorority girl)
Mary - Sasha's employee (?) stands over you to lick her out after you lick Sasha out in one scene, depending on choices.
Laura - Roxy's cousin who (potentially) catches the two of you assfucking.
Alyssa - Sasha's maid/sex slave
There are a couple missing as well, like Emma (the nurse you can have a session with in the most pointless path) and since it's not all women you can bang, Ingrid from the porn studio is missing too.